F. Belém, E. Martins, T. Pontes, J. Almeida, and M. Gonçalves. Proceedings of the 34th international ACM SIGIR conference on Research and development in Information Retrieval, page 1033--1042. New York, NY, USA, ACM, (2011)
O. Callaú, R. Robbes, \. Tanter, and D. Röthlisberger. Proceedings of the 8th Working Conference on Mining Software Repositories, page 23--32. New York, NY, USA, ACM, (2011)
M. Calonder, V. Lepetit, C. Strecha, and P. Fua. Computer Vision – ECCV 2010, volume 6314 of Lecture Notes in Computer Science, Springer Berlin Heidelberg, (2010)
M. Griss. Proceedings of the first conference on Software product lines : experience and research directions, page 271--288. Norwell, MA, USA, Kluwer Academic Publishers, (2000)