Terms containing basic concepts from which Petri nets have developed

Subject	English	Russian
progr.	basic concepts from which Petri nets have developed	основные понятия, с которых начали развитие сети Петри (ssn)
progr.	theoretic development of the basic concepts from which Petri nets have developed	теоретическая разработка основных понятий, с которых начали развитие сети Петри (ssn)