1. Belkin, M., Niyogi, P., Sindhwani, V.: Manifold regularization: a geometric framework for learning from labeled and unlabeled examples. JMLR 7, 2399–2434 (2006)
2. Bishop, C.M.: Pattern Recognition and Machine Learning, 1st edn. Springer, New York (2006)
3. Chang, X., Lin, S.B., Zhou, D.X.: Distributed semi-supervised learning with kernel ridge regression. JMLR 18(1), 1493–1514 (2017)
4. Chapelle, O., Schölkopf, B., Zien, A. (eds.): Semi-Supervised Learning. MIT Press, Cambridge, MA (2006)
5. Chen, J., Liu, Y.: Locally linear embedding: a survey. Artif. Intell. Rev. 36(1), 29–48 (2011)