1. Pattern Classification and Scene Analysis;Duda,1973
2. Introduction to Statistical Pattern Recognition;Fukunaga,1990
3. Pattern Recognition: A Statistical Approach;Devjver,1982
4. Nearest neighbor pattern classification;Cover;IEEE Trans. Inform. Theory,1967
5. B.V. Dasarathy (Ed.), Nearest Neighbor (NN) Norms: NN Pattern Classification Techniques, IEEE Computer Society Press, Silver Spring, MD, 1991.