FREY, Niels Henrik. An Experimental Comparison Between a Light Pen and a Joystick when Used for Free-Hand Drawing. DAIMI Report Series, [S. l.], v. 8, n. 100, 1979. DOI: 10.7146/dpb.v8i100.6516. Disponível em: https://tidsskrift.dk/daimipb/article/view/6516. Acesso em: 26 dec. 2025.