M. Heywood, and A. Zincir-Heywood. Systems, Man, and Cybernetics, 2000 IEEE International
Conference, 5, page 3823--3828. IEEE Press, (8-11 October 2000)
D. Hou, and D. Pletcher. Proceedings of the 2nd International Workshop on Recommendation Systems for Software Engineering, page 26--30. New York, NY, USA, ACM, (2010)