Guo, Qianrui, Yongtian Wang, Yue Liu, and Dong Han. “A Pen-Based Interactive Projection System Based on the Infrared Scanning Projector”. International Journal of Virtual Reality 9, no. 3 (January 1, 2010): 83–86. Accessed December 7, 2025. https://ijvr.eu/article/view/2783.