1. The Workflow Management Coalition Specification, Workflow Management Coalition Terminology & Glossary; Document Number WFMC-TC-1011; Document Status - Issue 3.0 (February 1999)
2. definitions,
http://cscmp.org/aboutcscmp/definitions.asp
(February 12, 2012)
3. van der Aalst, W.M.P., van Hee, K.M.: Workflow Management – Models, Methods, and Systems. The MIT Press, Cambridge (2002)
4. Jablonski, S., Bussler, S.: Workflow Management: Modeling Concepts, Architecture and Implementation. International Thomson Computer Press (1996)
5. van der Aalst, W.M.P., ter Hofstede, A.H.M.: Verification of Workflow Task Structures: A Petri-net-based approach