Fuhl, W., D. Hospach, T. C. Kübler, W. Rosenstiel, O. Bringmann, and E. Kasneci. “Ways of Improving the Precision of Eye Tracking Data: Controlling the Influence of Dirt and Dust on Pupil Detection”. Journal of Eye Movement Research, vol. 10, no. 3, May 2017, doi:10.16910/jemr.10.3.1.