A. N. Rajagopalan Rama Chellappa Nathan Koterba Robust Face Recognition in the Presence of Clutter. 1-9 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2688&spage=1 2003 conf/avbpa/2003 AVBPA db/conf/avbpa/avbpa2003.html#RajagopalanCK03