King Hong Cheung Jane You James Liu Tony W. H. Ao Ieong Appearance-Based Face Recognition Using Aggregated 2D Gabor Features. 572-579 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3214&spage=572 2004 conf/kes/2004-2 KES db/conf/kes/kes2004-2.html#CheungYLI04