@book{stats,
  title={{Applied multivariate statistical data analysis}},
  author={Johnson, R.A. and Wichern, D.W.},
  year={2007},
  publisher={Prentice Hall: Upper Saddle River, NJ},
  edition={$6^{th}$}
}



@book{dhs,
  title={{Pattern Classification}},
  author={Duda, R.O. and Hart, PE and Stork, DG},
  year={2001},
  publisher={John Wiley and Sons},
  edition={$2^{nd}$}
}
