CALIGARIS, M. G. Designing tools for Analytic Geometry: the Quadrics. New Trends and Issues Proceedings on Humanities and Social Sciences, [S. l.], v. 4, n. 3, p. 219–228, 2017. DOI: 10.18844/prosoc.v4i3.2643. Disponível em: https://un-pub.eu/ojs/index.php/pntsbs/article/view/2643. Acesso em: 6 may. 2024.