Wolf Kienzle Gökhan H. Bakir Matthias O. Franz Bernhard Schölkopf Face Detection - Efficient and Rank Deficient. 2004 conf/nips/2004 NIPS http://books.nips.cc/papers/files/nips17/NIPS2004_0437.pdf db/conf/nips/nips2004.html#KienzleBFS04