1. [Belkin 02] Belkin, M. and Niyogi, P.: Laplacian eigenmaps and spectral techniques for embedding and clustering, in Advances in Neural Information Processing Systems, Vol. 14, pp. 585-591 (2002)
2. Learning Eigenfunctions Links Spectral Embedding and Kernel PCA
3. [Bishop 06] Bishop, C. M.: Pattern Recognition and Machine Learning, Springer (2006)
4. [Borg 97] Borg, I. and Groenen, P.: Modern Multidimensional Scaling: Theory and Applications, Springer (1997)
5. [Burgard 99] Burgard, W., Fox, D., Jans, H., Matenar, C., and Thrun, S.: Sonar-Based Mapping of Large-Scale Mobile Robot Environments using EM, in Proceedings of 16th International Confence on Machine Learning, pp. 67-76 (1999)