Andres Figueroa Avraham Goldstein Tao Jiang Maciej Kurowski Andrzej Lingas Mia Persson Approximate Clustering of Fingerprint Vectors with Missing Values. 57-60 2005 conf/cats/2005 CATS http://crpit.com/confpapers/CRPITV41Figueroa.pdf db/conf/cats/cats2005.html#FigueroaGJKLP05