F. Montagut, R. Molva, and S. Tecumseh Golega. Systems, Man, and Cybernetics, Part C: Applications and Reviews, IEEE Transactions on, 38, page 319 -333. (May 2008)
M. Aslam, S. Auer, J. Chen, and M. Hermann. Grid and Peer-to-Peer based Workflows (GPWW), September 4th, Vienna, Austria, volume 4103 of BPM 2006 Workshops, page 400-415. Berlin / Heidelberg, Springer, (September 2006)
M. Hepp, F. Leymann, J. Domingue, A. Wahler, and D. Fensel. Proceedings of the IEEE International Conference on e-Business Engineering, page 535--540. Washington, DC, USA, IEEE Computer Society, (2005)