@proceedings{ Solr-acta59658, title = {Operation research methods in Petri net-based analysis of IT system [abstract]}, series = {Conference of PhD Students in Computer Science}, author = {Gyapay Szilvia}, address = {University of Szeged}, publisher = {Szeged}, year = {2002}, url = {http://acta.bibl.u-szeged.hu/59658/1/cscs_2002_036.pdf} }