Kenji Okuma Ali Taleghani Nando de Freitas James J. Little David G. Lowe A Boosted Particle Filter: Multitarget Detection and Tracking. 28-39 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3021&spage=28 2004 conf/eccv/2004-1 ECCV (1) db/conf/eccv/eccv2004-1.html#OkumaTFLL04