1. Abney, S.: Bootstrapping. In: Proceedings of the 40th Annual Meeting of the Association for Computational Linguistics, Philadelphia, PA, pp. 360–367 (2002)
2. Balcan, M.F., Blum, A., Yang, K.: Co-training and expansion: Towards bridging theory and practice. In: Saul, L.K., Weiss, Y., Bottou, L. (eds.) Advances in Neural Information Processing Systems, vol. 17, pp. 89–96. MIT Press, Cambridge, MA (2005)
3. Belkin, M., Niyogi, P.: Semi-supervised learning on Riemannian manifolds. Machine Learning 56, 209–239 (2004)
4. Blake, C., Keogh, E., Merz, C.J.: UCI repository of machine learning databases. Department of Information and Computer Science, University of California, Irvine, CA (1998), http://www.ics.uci.edu/~mlearn/MLRepository.html
5. Blum, A., Mitchell, T.: Combining labeled and unlabeled data with co-training. In: Proceedings of the 11th Annual Conference on Computational Learning Theory, Madison, WI, pp. 92–100 (1998)