Bácsó, Sándor, and Zoltán Szilasi. “Notes on the Representational Possibilities of Projective Quadrics in Four Dimensions”. Teaching Mathematics and Computer Science 4, no. 1 (June 1, 2006): 167–177. Accessed September 27, 2024. https://ojs.lib.unideb.hu/tmcs/article/view/14766.