1. UML 2.0 Superstructure Specification. Technical report, Object Management Group (OMG) (August 2005)
2. Business Process Modeling Notation (BPMN) Specification, Final Adopted Specification. Technical report, Object Management Group (OMG) (February 2006),
http://www.bpmn.org/
3. Andrews, T., et al.: Business Process Execution Language for Web Services, version 1.1. Technical report, OASIS (May 2003),
http://www-106.ibm.com/developerworks/webservices/library/ws-bpel
4. Lecture Notes in Computer Science;A. Barros,2007
5. Chakravarthy, S., Mishra, D.: Snoop: An expressive event specification language for active databases. Data Knowledge Engineering 14(1), 1–26 (1994)