Liu, Shuo Samuel, Andrew Rawicz, Teng Ma, Cheng Zhang, Kyle Lin, Siavash Rezaei, and Eion Wu. 2010. “An Eye-Gaze Tracking and Human Computer Interface System for People With ALS and Other Locked-in Diseases”. CMBES Proceedings 33 (1). https://proceedings.cmbes.ca/index.php/proceedings/article/view/525.