Yeunggyu Park Hoonju Yun Myongseop Song Jaihie Kim A Fast Circular Edge Detector for the Iris Region Segmentation. 417-423 http://link.springer.de/link/service/series/0558/bibs/1811/18110417.htm 2000 conf/bmcv/2000 Biologically Motivated Computer Vision db/conf/bmcv/bmcv2000.html#ParkYSK00