@INPROCEEDINGS{Sae_04,
   AUTHOR      = {M. Saerens and F. Fouss and L. Yen and P. Dupont},
   TITLE       = {The principal component analysis of a graph and its relationships to spectral clustering},
   BOOKTITLE   = {Proceedings of the 15th European Conference on Machine Learning (ECML)},
   YEAR        = {2004},
   MONTH       = {},
   PAGE        = {},
   ADDRESS     = {Pisa, Italy},
   URL         = {http://www.isys.ucl.ac.be/staff/francois/Articles/Saerens2004d.pdf},
}