1. Rittgen, P.: Collaborative Modeling - A Design Science Approach. In: Proc. HICSS '09. (2009) 1-10
2. Mendling, J.C.Recker,., Wolf, J.: Collaboration features in current bpm tools. EMISA Forum 32 (2012) 48-65
3. Cours Angnès Front «Systèmes d'Information Conception et Processus»
4. Mili, G. B. Jaoude, É. Lefebvre, G. Tremblay, and A. Petrenko, « Business Process Modeling Languages: Sorting Through the Alphabet Soup », p. 54.
5. Business Process Modeling Notation Specification, OMG Final Adopted Specification, February 2006, dtc/06-02-01 (http://www.bpmn.org/Documents/OMG Final Adopted BPMN 1-0 Spec 06-02-01.pdf).