M. Bilenko, and R. Mooney. Proceedings of the 9th ACM SIGKDD International Conference on Knowledge Discovery and Data Mining (KDD-2003), page 39--48. (2003)
Y. Sure, S. Bloehdorn, P. Haase, J. Hartmann, and D. Oberle. Proceedings of the 12th Portuguese Conference on Artificial Intelligence - Progress in Artificial Intelligence (EPIA 2005), volume 3803 of LNCS, page 218 - 231. Covilha, Portugal, Springer, (December 2005)
T. Joachims, N. Cristianini, and J. Shawe-Taylor. Proceedings of ICML-01, 18th International Conference on Machine Learning, page 250--257. Morgan Kaufmann Publishers, San Francisco, US, (2001)
T. Jaakkola, and D. Haussler. Advances in Neural Information Processing Systems 11 -- NIPS Conference, Denver, Colorado, USA, November 30 - December 5, 1998), page 487-493. The MIT Press, (1999)