@article{MikaRaetschWestonetal.2000,
  author    = {Sebastian Mika and Gunnar R{\"a}tsch and J. Weston and B. Sch{\"o}lkopf and Alexander J. Smola and Klaus-Robert M{\"u}ller},
  title     = {Invariant feature extraction and classification in kernel spaces},
  year      = {2000},
}