J. Mak, J. Mak, C. Choy, C. Choy, D. Lun, and D. Lun. Software Engineering, 2004. ICSE 2004. Proceedings. 26th International Conference on, page 252--261. (2004)
R. Pettit, and H. Gomaa. ICSE '06: Proceeding of the 28th international conference on Software engineering, page 202--211. New York, NY, USA, ACM Press, (2006)