Jeongseok Ki Yong-Moo Kwon Kwanghoon Sohn 3D Gaze Tracking and Analysis for Attentive Human Computer Interaction. 617-621 2007 FBIT http://doi.ieeecomputersociety.org/10.1109/FBIT.2007.15 conf/fbit/2007 db/conf/fbit/fbit2007.html#KiKS07