R. Bekkerman, R. El-Yaniv, and A. McCallum. ICML '05: Proceedings of the 22nd international conference on Machine learning, page 41--48. New York, NY, USA, ACM Press, (2005)
I. Dhillon. KDD '01: Proceedings of the seventh ACM SIGKDD international conference on Knowledge discovery and data mining, page 269--274. New York, NY, USA, ACM Press, (2001)