P. Evangelatos, C. Iliou, T. Mavropoulos, K. Apostolou, T. Tsikrika, S. Vrochidis and I. Kompatsiaris,”Named Entity Recognition in Cyber Threat Intelligence Using Transformer-based Models”, in the proceedings of the 2021 IEEE International Conference on Cyber Security and Resilience (IEEE CSR) – Workshops, Virtual Conference, July 26 (Mon) – 28 (Wed), 2021, pp. 348-353, DOI:10.1109/CSR51186.2021.9527981.