@MISC{E_SIEC.MIZ,
  AUTHOR = {Korczy\'nski, Waldemar},
  TITLE = {Definitions of {P}etri Net. {P}art {II}},
  DAY = {31},
  MONTH = {January},
  YEAR = {1992},
  ADDRESS1 = {Pedagogical University\\Kielce},
  SUMMARY = {In the paper an equational definition of Petri net is given.}}

