@Article{Wirtz+2001,
  AUTHOR = {Wirtz, Guido and Weske, Mathias and Giese, Holger},
  TITLE = {{The OCoN Approach to Workflow Modeling in Object-Oriented
  Systems}},
  YEAR = {2001},
  JOURNAL = {Information Systems Frontiers},
  VOLUME = {3},
  NUMBER = {3},
  PAGES = {357-376},
  URL = {Journal http://www.wkap.nl/journalhome.htm/1387-3326},
  ABSTRACT = {Workflow management aims at modeling and executing
  application processes in complex technical and organizational
  environments. Modern information systems are often based
  on object-oriented design techniques, for instance, the Unified
  Modeling Language (UML). These systems consist of application objects
  which collaborate to achieve a common goal. Although application
  objects collaborate in the context of business processes that can be
  supported by workflow technology, workflow modeling is typically done
  with proprietary workflow languages. Hence, two separate formalisms
  are present for modeling application objects and workflows. In this
  paper we try to remedy this situation by proposing the use of Object
  Coordination Nets (OCoN) for workflow modeling. OCoN nets provide a
  seamless integration with UML structure diagrams. The OCoN formalism
  also helps to deal with all relevant aspects of modeling complex
  workflow systems in a scalable and consistent manner.}
}