William Perrizo Qin Ding Maleq Khan Anne Denton Qiang Ding An efficient weighted nearest neighbour classifier using vertical data representation. 64-78 2007 2 IJBIDM 1 http://dx.doi.org/10.1504/IJBIDM.2007.012946 db/journals/ijbidm/ijbidm2.html#PerrizoDKDD07