@ARTICLE{SmoMikSchWil01,
    author = {Smola, A.J. and Mika, S. and Sch{\"o}lkopf, B. and Williamson, R.C.},
    title = "Regularized Principal Manifolds",
    journal = "Journal of Machine Learning Research",
    year = "2001",
    volume = "1",
    pages = "179--209",
    month = "June",
    pdf = "http://www.ai.mit.edu/projects/jmlr/papers/volume1/smola01a/smola01a.pdf",
    postscript = "http://www.ai.mit.edu/projects/jmlr/papers/volume1/smola01a/smola01a.ps",
    publisher = "MIT Press"
}