Describir: Modelling, Analysis, and Simulation of Computer and Telecommunication Systems 28th International Symposium, MASCOTS 2020, Nice, France, November 17-19, 2020, Revised Selected Papers / edited by Maria Carla Calzarossa, Erol Gelenbe, Krysztof Grochla, Ricardo Lent, Tadeusz Czachórski. [electronic resource] :