Thesis

"Analysis of Generalized Singular Systems", Ph.D. Thesis, Dept. of Mathematics, School of Applied Sciences, Aristotle University of Thessaloniki, 1990.

Publications

2025

1. Tsirtsakis, P., Zacharis, G., Maraslidis, G. S., & Fragulis, G. F. (2025). Deep learning for object recognition: A comprehensive review of models and algorithms. International Journal of Cognitive Computing in Engineering. Elsevier.
2. Moysis, L., Lawnik, M., Baptista, M. S., Volos, C., & Fragulis, G. F. (2025). A review of chaotification techniques for discrete-time systems. Nonlinear Dynamics, 1-17. Springer Netherlands Dordrecht.
3. Gkiolnta, E., Roy, D., & Fragulis, G. F. (2025). Challenges and Ethical Considerations in Implementing Assistive Technologies in Healthcare. Technologies, 13(2), 48. MDPI.
4. Moysis, L., Lawnik, M., Volos, C., Baptista, M. S., Goudos, S. K., & Fragulis, G. F. (2025). Testing the Strength of Chaotic Systems as Seeds in a Pseudo Random Bit Generator. IEEE Access. IEEE.
5. Iliadis, P., Amarantidis, S., & Fragulis, G. F. (2025). An experimental analysis and simulation of Braitenberg vehicles using Lego Ev3 mindstorms. International Journal of Entertainment Technology and Management, 2(1), 1-24. Inderscience Publishers (IEL).
6. Lawnik, M., Moysis, L., García-Grimaldo, C., Campos-Cantón, E., Fragulis, G. F., & Volos, C. (2025). Generalized Vertigo Maps—A New Family of Chaotic Maps with Robust Chaos but Without Fixed Points. International Journal of Bifurcation and Chaos, 2530012. World Scientific Publishing Company.
7. Moysis, L., Lawnik, M., Maraslidis, G. S., Fragulis, G. F., & Volos, C. (2025). False Strange Attractors as Sources of Pseudo Randomness. Physica Scripta.

2024

8. Lazaridis, L., & Fragulis, G. F. (2024). Creating a Newer and Improved Procedural Content Generation (PCG) Algorithm with Minimal Human Intervention for Computer Gaming Development. Computers, 13(11), 304.
9. Papadopoulos, C., Kollias, K. F., & Fragulis, G. F. (2024). Recent Advancements in Federated Learning: State of the Art, Fundamentals, Principles, IoT Applications and Future Trends. Future Internet, 16(11), 1-41.
10. Moysis, L., Lawnik, M., Volos, C., Baptista, M. S., Fragulis, G. F., & Goudos, S. K. (2024, March). Validating a Chaos-Based PRBG Under Different Chaotic Maps. In 2024 Panhellenic Conference on Electronics & Telecommunications (PACET) (pp. 1-4). IEEE.
11. Makris, I., Lytos, A., Kyranou, K., Argyriou, V., Lagkas, T., Kollias, K. F., & Sarigianndis, P. (2024, October). Detecting personal protective equipment (PPE) utilizing YOLOv8 in a federated learning environment. In AIP Conference Proceedings (Vol. 3220, No. 1). AIP Publishing.
12. Dialesiotis, S., Papatsimouli, M., Asimopoulos, K. N., & Fragulis, G. F. (2024, October). Smart cars and autonomous driving in public transportation: An analysis of European and Greek perspectives. In AIP Conference Proceedings (Vol. 3220, No. 1). AIP Publishing.
13. Stefanidou, M., Maraslidis, G. S., Antoniadis, I., & Fragulis, G. F. (2024, October). Cloud-driven network security: A survey of methods, challenges, and innovations. In AIP Conference Proceedings (Vol. 3220, No. 1). AIP Publishing.
14. Poulianiti, E., Maraslidis, G. S., Tsintotas, K., Kafetzis, I., Koumboulis, F., Asimopoulos, N., & Fragulis, G. F. (2024, October). Recent developments in robotic vision and path following in robotic arms and autonomous robots. In AIP Conference Proceedings (Vol. 3220, No. 1). AIP Publishing.
15. Nikou, R., Tsaknis, A., Margaritis, P., Alvanos, S., Kollias, K. F., Maraslidis, G. S., & Fragulis, G. F. (2024, October). Machine learning data-based approaches for autism spectrum disorder classification utilizing facial images. In AIP Conference Proceedings (Vol. 3220, No. 1). AIP Publishing.
16. Kollias, K. F., Maraslidis, G. S., Sarigiannidis, P., & Fragulis, G. F. (2024, October). Application of machine learning on eye-tracking data for autism detection: The case of high-functioning adults. In AIP Conference Proceedings (Vol. 3220, No. 1). AIP Publishing.
17. Efthymiou, G., Antoniadis, I., & Fragulis, G. F. (2024, October). The attitudes of secondary school teachers towards the application of gamification in Greek education. In AIP Conference Proceedings (Vol. 3220, No. 1). AIP Publishing.
18. Piperakis, S., Papatsimouli, M., Argyriou, V., Sarigiannidis, P., & Fragulis, G. F. (2024, June). SignTrack: Advancements in Real-Time Sign Language Processing for Inclusive Computing with optimized AI. In 2024 13th International Conference on Modern Circuits and Systems Technologies (MOCAST) (pp. 1-4). IEEE.
19. Siniosoglou, I., Argyriou, V., Fragulis, G., Fouliras, P., Papadopoulos, G. T., Lytos, A., & Sarigiannidis, P. (2024). Applied federated model personalization in the industrial domain: a comparative study. IEEE Open Journal of the Communications Society.
20. Moysis, L., Lawnik, M., Baptista, M. S., Volos, C., & Fragulis, G. F. (2024). A family of 1D modulo-based maps without equilibria and robust chaos: application to a PRBG. Nonlinear Dynamics, 1-25.
21. Tripathi, M., Moysis, L., Gupta, M. K., Fragulis, G. F., & Volos, C. (2024). Observer Design for Nonlinear Descriptor Systems: A Survey on System Nonlinearities. Circuits, Systems, and Signal Processing, 1-20.
22. Manakitsa, N., Maraslidis, G. S., Moysis, L., & Fragulis, G. F. (2024). A Review of Machine Learning and Deep Learning for Object Detection, Semantic Segmentation, and Human Action Recognition in Machine and Robotic Vision. Technologies, 12(2), 15.

2023

23. Kouvakas, N. D., Koumboulis, F. N., Fragkoulis, D. G., & Fragulis, G. F. (2023). Metaheuristic Procedures for the Determination of a Bank of Switching Observers toward Soft Sensor Design with Application to an Alcoholic Fermentation Process. Mathematics, 11(23), 4733.
24. Pekias, A., Maraslidis, G. S., Tsipouras, M. G., Koumboulis, F. N., & Fragulis, G. F. (2023, August). Power Supply Technologies for Drones and Machine Vision Applications: A Comparative Analysis and Future Trends. In Telecom (Vol. 4, No. 3, pp. 459-476). MDPI.
25. Papatsimouli, M., Sarigiannidis, P., & Fragulis, G. F. (2023). A Survey of Advancements in Real-Time Sign Language Translators: Integration with IoT Technology. Technologies, 11(4), 83.
26. Siniosoglou, I., Bibi, S., Kollias, K. F., Fragulis, G. F., Radoglou-Grammatikis, P., Lagkas, T., ... & Sarigiannidis, P. Federated Learning Models in Decentralized Critical Infrastructure. In Shaping the Future of IoT with Edge Intelligence (pp. 95-115). River Publishers.
27. Siniosoglou, I., Xouveroudis, K., Argyriou, V., Lagkas, T., Saoulidis, T., Fragulis, G. F., ... & Sarigiannidis, P. (2023, December). Personalisation of Federated Learning Models Through Knowledge Distillation on Decentralised Data. In 2023 IEEE Globecom Workshops (GC Wkshps) (pp. 56-61). IEEE.
28. Kyrkos, K., Saprikis, V., Antoniadis, I., & Fragulis, G. F. (2023, November). An Online Open-Source System for the Digitization of Teachers’ Applications to the Directorate of Education. In AIP Conference Proceedings (Vol. 2909, No. 1). AIP Publishing.
29. Nevrataki, T., Iliadou, A., Ntolkeras, G., Sfakianakis, I., Lazaridis, L., Maraslidis, G., ... & Fragulis, G. F. (2023, November). A Survey on Federated Learning Applications in Healthcare, Finance, and Data Privacy/Data Security. In AIP Conference Proceedings (Vol. 2909, No. 1). AIP Publishing.
30. Damianos, L., Vlachas, C., Kollias, K. F., Asimopoulos, N., & Fragulis, G. F. (2023, November). Machine Learning Methods for Autism Spectrum Disorder Classification. In AIP Conference Proceedings (Vol. 2909, No. 1). AIP Publishing.
31. Sachpatzidis, A., Fragulis, G. F., & Antoniadis, I. (2023, November). Gamification in the Vocational Schools of Greece. In AIP Conference Proceedings (Vol. 2909, No. 1). AIP Publishing.
32. Asimopoulos, D. C., Papatsimouli, M., Michailidis, H., Sarigiannidis, P., & Fragulis, G. F. (2023, November). Simplified Face Image Generation and Aging with Conditional Generative Adversarial Networks. In AIP Conference Proceedings (Vol. 2909, No. 1). AIP Publishing.
33. Smyrlis, P. N., Tsakai, O., Vogklis, K., Giannakeas, N., Tzallas, A., Fragulis, G. F., & Tsipouras, M. G. (2023, November). A Comparative Testing of Yolov8-Based Algorithm for Cancer Biopsy Images: Case Study on Pannuke Pan-Cancer Dataset. In 2023 8th South-East Europe Design Automation, Computer Engineering, Computer Networks and Social Media Conference (SEEDA-CECNSM) (pp. 1-5). IEEE.
34. Ziouzios, D., Chatzisavvas, A., Fragulis, G. F., & Dasygenis, M. (2023, September). An Advanced Robotic System Utilizing Convolutional Neural Networks for Recycling. In International Conference on Frontiers of Artificial Intelligence, Ethics, and Multidisciplinary Applications (pp. 171-179). Singapore: Springer Nature Singapore.
35. Nevrataki, T., Iliadou, A., Ntolkeras, G., Sfakianakis, I., Lazaridis, L., Maraslidis, G., ... & Fragulis, G. F. (2023, November). A Survey on Federated Learning Applications in Healthcare, Finance, and Data Privacy/Data Security. In AIP Conference Proceedings (Vol. 2909, No. 1). AIP Publishing.
36. Damianos, L., Vlachas, C., Kollias, K. F., Asimopoulos, N., & Fragulis, G. F. (2023, November). Machine Learning Methods for Autism Spectrum Disorder Classification. In AIP Conference Proceedings (Vol. 2909, No. 1). AIP Publishing.
37. Sachpatzidis, A., Fragulis, G. F., & Antoniadis, I. (2023, November). Gamification in the Vocational Schools of Greece. In AIP Conference Proceedings (Vol. 2909, No. 1). AIP Publishing.
38. Asimopoulos, D. C., Papatsimouli, M., Michailidis, H., Sarigiannidis, P., & Fragulis, G. F. (2023, November). Simplified Face Image Generation and Aging with Conditional Generative Adversarial Networks. In AIP Conference Proceedings (Vol. 2909, No. 1). AIP Publishing.
39. Kollias, K. F., Sarigiannidis, P., Syriopoulou-Delli, C. K., & Fragulis, G. F. (2023, June). Implementation of Robots in Autism Spectrum Disorder Research: Diagnosis and Emotion Recognition and Expression. In 2023 12th International Conference on Modern Circuits and Systems Technologies (MOCAST) (pp. 1-4). IEEE.

2022

40. Koumboulis, F. N., Fragkoulis, D. G., Kalkanas, I., & Fragulis, G. F. (2022). Supervisor Design for a Pressurized Reactor Unit in the Presence of Sensor and Actuator Faults. Electronics, 11(16), 2534.
41. Maraslidis, G. S., Kottas, T. L., Tsipouras, M. G., & Fragulis, G. F. (2022). Design of a Fuzzy Logic Controller for the Double Pendulum Inverted on a Cart. Information, 13(8), 379.
42. Lazaridis, L., Kollias, K. F., Maraslidis, G., Michailidis, H., Papatsimouli, M., & Fragulis, G. F. (2022). Auto Generating Maps in a 2D Environment. In International Conference on Human-Computer Interaction (pp. 40-50). Springer, Cham.
43. Pekias, A., Maraslidis, G. S., Tsipouras, M. G., Koumboulis, F. N., & Fragulis, G. F. (2022). An Overview of Power Supply Technologies for Unmanned Aerial Vehicles (UAVs) and Machine Vision Applications. In 2022 7th South-East Europe Design Automation, Computer Engineering, Computer Networks and Social Media Conference (SEEDA-CECNSM) (pp. 1–8).
44. Kollias, K.-F., Syriopoulou-Delli, C. K., Sarigiannidis, P., & Fragulis, G. F. (2022). Autism Detection in High-Functioning Adults with the Application of Eye-Tracking Technology and Machine Learning. In 2022 11th International Conference on Modern Circuits and Systems Technologies (MOCAST) (pp. 1–4).
45. Papatsimouli, M., Kollias, K.-F., Lazaridis, L., Maraslidis, G., Michailidis, H., Sarigiannidis, P., & Fragulis, G. F. (2022). Real-Time Sign Language Translation Systems: A Review Study. In 2022 11th International Conference on Modern Circuits and Systems Technologies (MOCAST) (pp. 1–4).
46. Siniosoglou, I., Argyriou, V., Lagkas, T., Moscholios, I., Fragulis, G., & Sarigiannidis, P. (2022). Unsupervised Bias Evaluation of DNNs in Non-IID Federated Learning Through Latent Micro-Manifolds. In IEEE INFOCOM 2022 - IEEE Conference on Computer Communications Workshops (INFOCOM WKSHPS) (pp. 1–6).
47. Sachpatzidis, A., Fragulis, G. F., & Antoniadis, I. (2022). STE(A)M: Not Only Education but Also a Lifestyle. In SHS Web of Conferences, 139, 05005.
48. Velentzas, J., Kiriakoulis, G., Broni, G., Kartalis, N., Panou, G., & Fragulis, G. (2022). Digital and Advanced Electronic Signature: The Security Function, Especially in Electronic Commerce. In SHS Web of Conferences, 139, 03011.
49. Asimopoulos, D. C., Nitsiou, M., Lazaridis, L., & Fragulis, G. F. (2022). Generative Adversarial Networks: A Systematic Review and Applications. In SHS Web of Conferences, 139, 03012.
50. Papatsimouli, M., Lazaridis, L., Ziouzios, D., Dasygenis, M., & Fragulis, G. (2022). Internet Of Things (IoT) Awareness in Greece. In SHS Web of Conferences, 139, 03013. EDP Sciences.
51. Vlachas, C., Damianos, L., Gousetis, N., Mouratidis, I., Kelepouris, D., Kollias, K.-F., Asimopoulos, N., & Fragulis, G. F. (2022). Random Forest Classification Algorithm for Medical Industry Data. In SHS Web of Conferences, 139, 03008.
52. Zacharis, G., Gadounas, G., Tsirtsakis, P., Maraslidis, G., Assimopoulos, N., & Fragulis, G. (2022). Implementation and Optimization of Image Processing Algorithm Using Machine Learning and Image Compression. In SHS Web of Conferences, 139, 03014. EDP Sciences.
53. Tsakiris, G., Papadopoulos, C., Patrikalos, G., Kollias, K. F., Asimopoulos, N., & Fragulis, G. F. (2022). The Development of a Chatbot Using Convolutional Neural Networks. In SHS Web of Conferences, 139, 03009. EDP Sciences.
54. Zelios, A., Grammenos, A., Papatsimouli, M., Asimopoulos, N., & Fragulis, G. (2022). Recursive Neural Networks: Recent Results and Applications. In SHS Web of Conferences, 139, 03007. EDP Sciences.

2021

55. Kollias, K. F., Syriopoulou-Delli, C. K., Sarigiannidis, P., & Fragulis, G. F. (2021). The Contribution of Machine Learning and Eye-Tracking Technology in Autism Spectrum Disorder Research: A Systematic Review. Electronics, 10(23), 2982.
56. Kelli, V., Argyriou, V., Lagkas, T., Fragulis, G., Grigoriou, E., & Sarigiannidis, P. (2021). IDS for Industrial Applications: A Federated Learning Approach with Active Personalization. Sensors, 21(20), 6743.
57. Fragulis, G. F., Papatsimouli, M., Lazaridis, L., & Skordas, I. A. (2021). An Online Dynamic Examination System (ODES) Based on Open Source Software Tools. Software Impacts, 7, 100046.
58. Lazaridis, L., Papatsimouli, M., Kollias, K. F., Sarigiannidis, P., & Fragulis, G. F. (2021, July). “Hitboxes: A Survey about Collision Detection in Video Games,” in HCI in Games: Experience Design and Game Mechanics, vol. 1, Springer, 2021, pp. 314–326.
59. Michailidi, E., Michailidis, H., Tavoultzidou, S., Papatsimouli, M., & Fragulis, G. F. (2021). Digital transformation of small Greek companies during the Covid-19 pandemic. In The 2021 International Conference on Decision Aid Sciences and Applications, 2021, vol. 1.
60. Maraslidis, G. S., Kottas, T. L., Tsipouras, M. G., & Fragulis, G. F. (2021). A Fuzzy Logic Controller for Double Inverted Pendulum on a Cart. In 2021 6th South-East Europe Design Automation, Computer Engineering, Computer Networks and Social Media Conference (SEEDA-CECNSM), 2021, pp. 1–8.
61. Tsintotas, K. A., Bampis, L., An, S., Fragulis, G. F., Mouroutsos, S. G., & Gasteratos, A. (2021, August). Sequence-based mapping for probabilistic visual loop-closure detection. In 2021 IEEE International Conference on Imaging Systems and Techniques (IST) (pp. 1-6). IEEE.
62. Pliatsios, D., Sarigiannidis, P., Fragulis, G., Tsiakalos, A., & Margounakis, D. (2021, June). A Dynamic Recommendation-based Trust Scheme for the Smart Grid. In 2021 IEEE 7th International Conference on Network Softwarization (NetSoft) (pp. 464-469). IEEE.
63. Radoglou-Grammatikis, P., Sarigiannidis, P., Efstathopoulos, G., Lagkas, T., Fragulis, G., & Sarigiannidis, A. (2021, June). A Self-Learning Approach for Detecting Intrusions in Healthcare Systems. In ICC 2021-IEEE International Conference on Communications (pp. 1-6). IEEE.
64. Papatsimouli, M., Lazaridis, L., Kollias, K.-F., Skordas, I., & Fragulis, G. F. (2021). Speak with signs: Active learning platform for Greek Sign Language, English Sign Language, and their translation. In The 3rd ETLTC International Conference on Information and Communications Technology (ETLTC2021), 2021, vol. 102.

2020

65. Papatsimouli, M., Tavoultzidou, S., Saprikis, V., Lazaridis, L., Michailidi, E., Skordas, I., & Fragulis, G. F. (2021). Cyberbullying and Traditional Bullying in Greece: An Empirical Study. In The 3rd ETLTC International Conference on Information and Communications Technology (ETLTC2021), 2021, vol. 102, p. 7.
66. Bekhiti, B., Dahimene, A., Hariche, K., & Fragulis, G. F. (2020). On The Block Decomposition and Spectral Factors of λ-Matrices. Control and Cybernetics, 1(1).
67. Kokkonis, G., Gounopoulos, E., Tsiamitros, D., Stimoniaris, D., & Fragulis, G. F. (2020). Designing interconnected haptic interfaces and actuators for teleoperations in mobile ad hoc networks. International Journal of Entertainment Technology and Management, 1(1), 43-63.
68. Michailidi, E., Skordas, I., Papatsimouli, M., Lazaridis, L., Michailidis, H., Tavoultzidou, S., & Fragulis, G. F. (2020). A Greek language teaching platform for primary school pupils. The ACM Chapter International Conference on Educational Technology, Language and Technical Communication (ETLTC), Aizuwakamatsu, Fukushima, Japan, 27-31st January 2020.

2019

69. Lazaridis, L., Papatsimouli, M., & Fragulis, G. F. (2019). A Synchronous - Asynchronous Tele-education Platform. Int. J. of Smart Technology and Learning, Vol. 1, issue (2), 122-139.
70. Skordas, I. A., Triantafyllou, A. G., & Fragulis, G. F. (2019). Air quality meteorological and environmental information system in Western Macedonia, Hellas. International Journal of Web Engineering and Technology, 14(4), 341-366.

2018

71. Fragulis, G. F., Lazaridis, L., Papatsimouli, M., & Skordas, I. (2018). O.D.E.S.: An Online Dynamic Examination System based on a CMS Wordpress plugin. In Proceedings of the 3rd South-East Europe Design Automation, Computer Engineering, Computer Networks and Social Media Conference (SEEDA-CECNSM), Kastoria, Greece.
72. Tolis, C., & Fragulis, G. F. (2018). An experimental mechatronic design and control of a 5 DOF Robotic arm for identification and sorting of different sized objects. In 5th Int. Conf. on Mathematics and Computers in Sciences and Industry, CORFU ISLAND, GREECE, August 25-27, 2018.

2017

73. Skordas, I., Tsirekas, N., Kolovos, N., Fragulis, G. F., Triantafyllou, A. G., & Bouliou, M. G. (2017). e-Sem: Dynamic Seminar Management System for Primary, Secondary and Tertiary Education. In Proceedings of the South-East Europe Design Automation, Computer Engineering, Computer Networks and Social Media Conference (SEEDA-CECNSM), Kastoria, Greece.
74. Fragulis, G. F. (2017). Reduction of Linear Multivariable System Described by Internally Proper Polynomial Matrix Descriptions (PMDs) into An Equivalent State Space Model. In Proceedings of the Conference: SIAM Conference on Control and Its Applications (CT17), Pittsburgh, Pennsylvania, USA.
75. Bekhiti, B., Dahimene, A., & Fragulis, G. F. (2017). On block zeros in a second order system of partial differential equations. In The 30th International Conference of The Jangjeon Mathematical Society (ICJMS-2017), Algiers, Algeria.

2016-1989

76. Lazaridis, L., Papatsimouli, M., & Fragulis, G. F. (2016). S.A.T.E.P: Synchronous-Asynchronous Tele-education Platform. In Proceedings of the South-East Europe Design Automation, Computer Engineering, Computer Networks and Social Media Conference (SEEDA-CECNSM), Kastoria, Hellas.
77. Skordas, I., Fragulis, G. F., & Triantafyllou, A. G. (2014). A.Q.M.E.I.S.: Air Quality Meteorological and Environmental Information System in Western Macedonia, Hellas. In Proceedings of the 1st International Conference on Buildings Energy Efficiency and Renewable Energy Sources, Kozani, Greece.
78. Stavros Lazarou, George F. Fragulis and Nikolas Kiratzis, "AC Electrochemical Impedance Spectroscopy as a Tool For Solid Oxide Fuel Cell Operational Time Delays Calculation", Proceedings of the 6th International Workshop on Deregulated Electricity Market Issues In South - Eastern Europe - Demsee 2011, At Bled, Slovenia, Volume: 1, 2011.
79. Skordas Ioannis, George F. Fragulis and Athanassios G. Triantafyllou, "e-AirQuality: A Dynamic Web Based Application for Evaluating the Air Quality Index for the City of Kozani, Hellas", Proceedings of the 15th Panhellenic Conference on Informatics, PCI 2011, Kastoria, Greece, September 30 - Oct. 2, 2011.
80. G.F. Fragulis and B.G. Mertzios, "Division of two Polynomial Matrices Using the Fundamental Matrix Approach", Proceedings of the International Conference on Automation, Robotics and Control Systems ARCS 2009, At Orlando, FL, United States, Volume: 1, pp. 70-74, 2009.
81. G.F. Fragulis, P.K. Sotiropoulos and B.G. Mertzios, "Partial Realization of a Generalized Transfer Function", Proceedings of the 14th International Workshop on Systems, Signals and Image Processing, 2007 and 6th EURASIP Conference focused on Speech and Image Processing, Multimedia Communications and Services, Maribor, Slovenia, 27 – 30 June 2007.
82. B.G. Mertzios and G.F. Fragulis, "Tschirnhausen Polynomials of Linear Multivariable Systems Based on the Fundamental Matrix Approach", Proceedings of the International Conference on Systems, Signals and Image Processing (IWSSIP’06), Volume: 1, pp. 365-368, Budapest, Hungary, 21-23 September 2006.
83. B.G. Mertzios and G.F. Fragulis, "The fundamental matrix in second-order ARMA systems", Proceedings of 12th International Workshop on Systems, Signals & Image Processing, IWSSIP 2005, ISBN 0-907776-20-5, Chalkida, Greece, 22-24 September 2005.
84. B.G. Mertzios and G.F. Fragulis, "The fundamental matrix in ARMA systems", Proceedings of the 2004 IEEE International Conference on Industrial Technology, 1706 p., ISBN 0-7803-8662-0, Hammamet, Tunisia, December 8-10, 2004.
85. G.F. Fragulis and B.G. Mertzios, "Computation of the impulsive behaviour of multivariable linear systems using a division algorithm", Systems & Control Letters, 39, pp. 211-217, 2000.
86. G.F. Fragulis, "Transformation of a PMD into an implicit system using minimal realizations of its transfer function matrix in terms of finite and infinite spectral data", Journal of the Franklin Institute, Vol. 333(B), No.1, pp. 41-56, 1996.
87. G.F. Fragulis and A.I.G. Vardulakis, "Reachability of Polynomial Matrix Descriptions (PMD’s)", Circuits, Systems and Signal Processing, Vol. 14, No. 6, 1995.
88. G.F. Fragulis, "The Generalized Cayley-Hamilton theorem for polynomial matrices of arbitrary degree", International Journal of Control, Vol. 62, No. 6, pp. 1341-1349, 1995.
89. George F. Fragulis, "A division algorithm for arbitrary polynomial matrices", Proceedings of the 34th IEEE Conference on Decision and Control (CDC-95), New Orleans, Louisiana, USA, December 13-15, 1995.
90. George F. Fragulis, "Reachability/Controllability properties of internally proper Polynomial Matrix Descriptions", Proceedings of the INRIA/IEEE Conference on Emerging Technologies and Factory Automation - ETFA-95, October 10-13, Paris, France, 1995.
91. George F. Fragulis, "Extension of Cayley-Hamilton theorem for arbitrary polynomial matrices", Proceedings of the INRIA/IEEE Conference on Emerging Technologies and Factory Automation - ETFA-95, October 10-13, Paris, France, 1995.
92. George F. Fragulis and B.G. Mertzios, "Computation of the Impulsive Behavior of a Multivariable System described by a PMD using a division algorithm", Proceedings of the 3rd Mediterranean Symposium on New directions in control and Automation, Limassol Cyprus, pp. 143-148, 11-13 July 1995.
93. George F. Fragulis, "Direct matrix tests for a general form PMD to be internally proper", Proceedings of the Inaugural Workshop of the International Institute for General Systems Studies, Slippery Rock University of Pennsylvania, USA, July 13-15, 1995.
94. G.F. Fragulis and A.I.G. Vardulakis, "Evaluation of the Reachability subspace of general form PMDs", KYBERNETIKA, Vol. 30, No. 6, pp. 617-628, 1994.
95. G.F. Fragulis, "Evaluation of the impulsive solution space of Linear Multivariable homogeneous implicit systems", KYBERNETIKA, Vol. 30, No. 6, pp. 629-638, 1994.
96. G.F. Fragulis, "Minimal Realizations of the inverse of a polynomial matrix using finite and infinite Jordan pairs", KYBERNETIKA, Vol. 30, No. 6, pp. 607-616, 1994.
97. G.F. Fragulis, "A closed formula for the determination of the impulsive solutions of Linear Homogeneous Matrix Differential Equations", IEEE Transactions of Automatic Control, Vol. AC-38, No. 11, pp. 1688-1695, 1993, DOI: 10.1109/9.262041.
98. G.F. Fragulis, B.G. Mertzios and A.I.G. Vardulakis, "Computation of the inverse of a polynomial matrix and evaluation of its Laurent expansion", International Journal of Control, Vol. 53, No. 2, pp. 431-443, 1991, https://doi.org/10.1080/00207179108953626.
99. A.I.G. Vardulakis and George F. Fragulis, "Impulsive behavior of autonomous generalized singular systems", Proceedings of the European Control Conference- ECC’91, Grenoble, France, 2-5 July 1991.
100. A.I.G. Vardulakis and G.F. Fragulis, "Infinite elementary divisors of polynomial matrices and impulsive solutions of Linear Homogeneous Matrix Differential Equations", Circuits, Systems and Signal Processing, Vol. 8, No. 3, 357-373, 1989, https://doi.org/10.1007/BF01598420.