@INPROCEEDINGS{AMVW99,
  author       = {Wil van der Aalst and Daniel Moldt and Rüdiger Valk and Frank Wienberg},
  title        = {Enacting Interorganizational Workflow Using Nets in Nets},
  booktitle    = {Workflow Management '99},
  year         = {1999},
  editor       = {Jörg Becker, Michael zur Mühlen, Michael Rosemann},
  number       = {70},
  pages        = {117-136},
  month        = {11},
  organization = {Universität Münster, Task Force Workflow},
  publisher    = { Münster}
}