Fuzzy UML and Petri Nets Modeling Investigations on the Pollution Impact on the Air Quality in the Vicinity of the Black Sea Constanta Romanian Resort. - Roxana-Elena Tudoroiu; Adina Astilean; Tiberiu Letia; Gabriela Neacsu; Zoltan Maroszy; Nicolae Tudoroiu (FedCSIS, 2011)