Loris Nanni Annalisa Franco Raffaele Cappelli Towards a Robust Face Detector. 57-69 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3087&spage=57 2004 conf/eccv/2004bioaw ECCV Workshop BioAW db/conf/eccv/eccv2004bioaw.html#NanniFC04