@MASTERSTHESIS{Braker2004diplom,
  author  = {Marco Braker},
  title   = {Workflowpetrinetze - Hierarchisierung mittels Netze-in-Netzen},
  school  = {Universität Hamburg, Fachbereich Informatik},
  year    = {2004},
  type    = {Diplomarbeit},
  address = {Vogt-Kölln-Str. 30, 22527 Hamburg, Germany},
  month   = {3}
}