Yasuto Nakanishi Takashi Fujii Kotaro Kiatjima Yoichi Sato Hideki Koike Vision-Based Face Tracking System for Large Displays. 152-159 2002 conf/huc/2002 Ubicomp http://link.springer.de/link/service/series/0558/bibs/2498/24980152.htm db/conf/huc/ubicomp2002.html#NakanishiFKSK02