The basic ideas are described in the following papers:
N. Markuš, M. Frljak, I. S. Pandžić, J. Ahlberg, R. Forchheimer
Eye pupil localization with an ensemble of randomized trees, Pattern Recognition, link, 2014
N. Markuš, M. Frljak, I. S. Pandžić, J. Ahlberg, R. Forchheimer
Fast Localization of Facial Landmark Points, technical report, arXiv
For people who wish to test the method themselves, a demo application for windows-based machines can be downloaded here.
Videos demonstrating our results are available here and here (or on YouTube; here and here).