Čapkovič, F. 2021. Modelling and Control of Resource Allocation Systems within Discrete Event Systems by Means of Petri Nets – Part 1: Invariants, Siphons and Traps in Deadlock Avoidance. Computing and Informatics. 40, 3 (Nov. 2021), 648–689. DOI:https://doi.org/10.31577/cai_2021_3_648.