A. Sarma, G. Bortis, and A. van der Hoek. Proceedings of the twenty-second IEEE/ACM international conference on Automated software engineering, page 94--103. New York, NY, USA, ACM, (2007)
A. Kittur, E. Chi, and B. Suh. CHI '09: Proceedings of the 27th international conference on Human factors in computing systems, page 1509--1512. New York, NY, USA, ACM, (2009)
U. Junker. Proceedings of the 19th National Conference on Artificial Intelligence, page 167--172. Menlo Park, California, AAAI Press / The MIT Press, (2004)