@article {Guarracino2007JC,
  author =      "Cifarelli, C. and Guarracino, M.R. and Seref, O. and Cuciniello, S. and Pardalos, P.M.",
  title =       "Incremental Classification with Generalized Eigenvalues",
  journal =     "Journal of Classification",
  publisher =   "Springer",
  volume =      "24",
  number =      "2",
  pages =       "205--219",
  year =        "2007"
}