C. Lu, X. Chen, und E. Park. CIKM '09: Proceeding of the 18th ACM conference on Information and knowledge management, Seite 1545--1548. New York, NY, USA, ACM, (2009)
R. Bekkerman, R. El-Yaniv, und A. McCallum. ICML '05: Proceedings of the 22nd International Conference on Machine learning, Seite 41--48. New York, NY, USA, ACM, (2005)
A. Popescul, L. Ungar, D. Pennock, und S. Lawrence. 17th Conference on Uncertainty in Artificial Intelligence, Seite 437--444. Seattle, Washington, (August 2001)