1. Belkin, M., Niyogi, P.: Semi-supervised learning on riemannian manifolds. Mach. Learn. 56(1–3), 209–239 (2004)
2. Belkin, M., Niyogi, P., Sindhwani, V.: Manifold regularization: a geometric framework for learning from labeled and unlabeled examples. J. Mach. Learn. Res. 7(1), 2399–2434 (2006)
3. Bennett, K.P., Demiriz, A.: Semi-supervised support vector machines. In: Proceedings of International Conference on Neural Information Processing Systems, pp. 368–374 (1999)
4. Blum, A., Chawla, S.: Learning from labeled and unlabeled data using graph mincuts. In: Proceedings of Eighteenth International Conference on Machine Learning, pp. 19–26 (2001)
5. Blum, A., Mitchell, T.: Combining labeled and unlabeled data with co-training. In: Proceedings of the 1998 Conference on Computational Learning Theory, pp. 92–100 (1998)