Kwanghyuk Bae Kang Ryoung Park Jaihie Kim 3D Head Position Estimation Using a Single Omnidirectional Camera for Non-intrusive Iris Recognition. 167-174 2006 conf/mrcs/2006 MRCS http://dx.doi.org/10.1007/11848035_24 db/conf/mrcs/mrcs2006.html#BaePK06