Coronado E, Siddiqui S, Sarakis L, Trakadas P, Prior S, Trullols-Cruces O, Centenaro M, Atxutegi E, Gkonis P, Gonzalez-Diaz S, et al. Cost-Efficient 5G Non-Public Network Roll-Out: The Affordable5G Approach. In: 2021 IEEE International Mediterranean Conference on Communications and Networking (MeditCom). IEEE; 2021.

Kalafatelis A, Panagos K, Giannopoulos AE, Spantideas ST, Kapsalis NC, Touloupou M, Kapassa E, Katelaris L, Christodoulou P, Christodoulou K, et al. Island: An interlinked semantically-enriched blockchain data framework. In: Economics of Grids, Clouds, Systems, and Services: 18th International Conference, GECON 2021, Virtual Event, September 21–23, 2021, Proceedings 18. Springer International Publishing; 2021. pp. 207–214.

Sarakis L, Trakadas P, Martrat J, Prior S, Trullols-Cruces O, Coronado E{\'ıa, Centenaro M, Kontopoulos G, Atxutegi E, Gkonis P, et al. Cost-efficient 5G non-public network roll-out: The Affordable5G approach. In: 2021 IEEE International Mediterranean Conference on Communications and Networking (MeditCom). IEEE; 2021. pp. 221–227.

Gkonis P, Trakadas P, Sarakis L, Giannopoulos A, Spantideas S, Capsalis N. On the performance evaluation of 5G MIMO networks employing NOMA via system-link level simulations. In: 2021 IEEE 9th International Conference on Information, Communication and Networks (ICICN). IEEE; 2021. pp. 264–268.

Masip-Bruin X, Mar{\'ın-Tordera E, Ruiz J, Jukan A, Trakadas P, Cernivec A, Lioy A, López D, Santos H, Gonos A, et al. Cybersecurity in ICT supply chains: key challenges and a relevant architecture. Sensors. 2021;21:6057.

Lavdas S, Gkonis PK, Zinonos Z, Trakadas P, Sarakis L. An adaptive hybrid beamforming approach for 5G-MIMO mmWave wireless cellular networks. IEEE Access. 2021;9:127767–127778.

Giannopoulos A, Spantideas S, Kapsalis N, Karkazis P, Trakadas P. Deep reinforcement learning for energy-efficient multi-channel transmissions in 5G cognitive hetnets: Centralized, decentralized and transfer learning based solutions. IEEE Access. 2021;9:129358–129374.

Prekas S, Karkazis P, Nikolakakis V, Trakadas P. Comprehensive comparison of VNE solutions based on different coordination approaches. In: Telecom. Vol. 2. MDPI; 2021. pp. 390–412.

Lavdas S, Gkonis P, Trakadas P, Sarakis L. On the Performance Limitations of Realistic Massive MIMO Deployments in 5G mmWave Wireless Cellular Networks. In: 2021 IEEE 94th Vehicular Technology Conference (VTC2021-Fall). IEEE; 2021. pp. 1–5.

Trakadas P, Leligou HC, Karkazis P, Gonos A, Zahariadis T. Farm to fork: Securing a supply chain with direct impact on food security. In: 2021 IEEE 22nd International Conference on High Performance Switching and Routing (HPSR). IEEE; 2021. pp. 1–6.

Spantideas S, Giannopoulos A, Kapsalis N, Kalafatelis A, Capsalis C, Trakadas P. Joint Energy-efficient and Throughput-sufficient Transmissions in 5G Cells with Deep Q-Learning. In: Proceedings of the 2021 IEEE International Mediterranean Conference on Communications and Networking (MeditCom), Athens, Greece. ; 2021. pp. 7–10.

Alemany P, Román A, Vilalta R, Pol A, Bonnet J, Kapassa E, Touloupou M, Kyriazis D, Karkazis P, Trakadas P, et al. A KPI-enabled NFV MANO architecture for network slicing with QoS. IEEE Communications Magazine. 2021;59:44–50.

Trakadas P, Sarakis L, Giannopoulos A, Spantideas S, Capsalis N, Gkonis P, Karkazis P, Rigazzi G, Antonopoulos A, Cambeiro MA, et al. A cost-efficient 5G non-public network architectural approach: Key concepts and enablers, building blocks and potential use cases. Sensors. 2021;21:5578.

Masip-Bruin X, Mar{\'ın-Tordera E, Ruiz J, Jukan A, Trakadas P, Cernivec A, Lioy A, López D, Santos H, Gonos A, et al. Provisioning Cybersecurity in ICT Complex Supply Chains: An Overview, Key Issues and a Relevant Architecture. 2021.

Lessi CC, Chochliouros IP, Trakadas P, Karkazis P. Advanced First Responders’ Services by Using FASTER Project Architectural Solution. In: IFIP International Conference on Artificial Intelligence Applications and Innovations. Springer International Publishing Cham; 2021. pp. 62–70.

Dimou A, Kogias DG, Trakadas P, Perossini F, Weller M, Balet O, Patrikakis CZ, Zahariadis T, Daras P. FASTER: First Responder Advanced Technologies for Safe and Efficient Emergency Response. In: Technology Development for Security Practitioners. Springer International Publishing Cham; 2021. pp. 447–460.

Angelopoulos A, Giannopoulos AE, Kapsalis NC, Spantideas ST, Sarakis L, Voliotis S, Trakadas P. Impact of classifiers to drift detection method: a comparison. In: International conference on engineering applications of neural networks. Springer International Publishing Cham; 2021. pp. 399–410.

Giannopoulos A, Spantideas S, Tsinos C, Trakadas P. Power control in 5G heterogeneous cells considering user demands using deep reinforcement learning. In: IFIP International Conference on Artificial Intelligence Applications and Innovations. Springer International Publishing Cham; 2021. pp. 95–105.

Giannopoulos A, Spantideas S, Capsalis N, Gkonis P, Karkazis P, Sarakis L, Trakadas P, Capsalis C. WIP: Demand-driven power allocation in wireless networks with deep Q-learning. In: 2021 IEEE 22nd International Symposium on a World of Wireless, Mobile and Multimedia Networks (WoWMoM). IEEE; 2021. pp. 248–251.