@article{articlea4fb3c83,
title   = {Improving Head Movement Tolerance of Cross-Ratio Based Eye Trackers},
author = {Coutinho, Flávio Luíz and Morimoto, Carlos Hitoshi},
year = {2013},
doi = {10.1007/s11263-012-0541-8},
journal   = {International Journal of Computer Vision}
}