Ries, Lilian Mari Kieling, and Ricardo Iserhardt Ries. “Mathematical Transformation Utilized in the Graphic Screen of an Apple Microcomputer”. Ciência e Natura 11, no. 11 (December 11, 1989): 21–26. Accessed October 17, 2024. https://periodicos.ufsm.br/cienciaenatura/article/view/25527.