L. Zeng, C. Lingenfelder, H. Lei, and H. Chang. ICSOC '08: Proceedings of the 6th International Conference on Service-Oriented Computing, page 147--161. Berlin, Heidelberg, Springer-Verlag, (2008)
L. Zeng, H. Lei, and H. Chang. ICSOC '07: Proceedings of the 5th international conference on Service-Oriented Computing, page 132--144. Berlin, Heidelberg, Springer-Verlag, (2007)