S. Angelov, P. Grefen, and D. Greefhorst. Joint Working IEEE/IFIP Conference on Software Architecture, 2009 & European Conference on Software Architecture. WICSA/ECSA 2009, page 141--150. IEEE, (September 2009)
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)