A Multi-Modal Gaze Tracking Algorithm - Haiming Su; Zhenjie Hou; Juan Huan; Ke Yan; Hao Ding (2019 International Conference on Internet of Things (iThings) and IEEE Green Computing and Communications (GreenCom) and IEEE Cyber, Physical and Social Computing (CPSCom) and IEEE Smart Data (SmartData), iThings/GreenCom/CPSCom/SmartData 2019, Atlanta, GA, USA, July 14-17, 2019, 2019)