D. Zowghi, and V. Gervasi. Information and Software Technology, 45 (14):
993--1009(2003)Eighth International Workshop on Requirements Engineering: Foundation for Software Quality.
L. Zhu, M. Staples, and V. Tosic. 12th International IEEE Enterprise Distributed Object Computing Conference, 2008. EDOC '08, page 24--30. IEEE, (September 2008)
S. Zhang, and S. Goddard. International Conference on Information Technology: Coding and Computing, 2005. ITCC 2005, 2, page 443-- 448 Vol. 2. IEEE, (April 2005)
B. Wang, C. Wen, W. Zhu, and J. Sheng. International Symposium on Computer Science and Computational Technology, 2008. ISCSCT '08, 2, page 383--386. IEEE, (December 2008)