Elzbieta Pekalska Artsiom Harol Carmen Lai Robert P. W. Duin Pairwise Selection of Features and Prototypes. 271-278 2005 CORES http://dx.doi.org/10.1007/3-540-32390-2_31 conf/cores/2005 db/conf/cores/cores2005.html#PekalskaHLD05