Computational Science - ICCS 2021 : 21st International Conference, Krakow, Poland, June 16-18, 2021, Proceedings, Part V - Paszynski, Maciej; Dongarra, Jack J.; Kranzlmüller, Dieter; Krzhizhanovskaya, Valeria V.; Sloot, Peter M. A. (Springer International Publishing, 2021)