GARCIA, Ronaldo A. Curvature lines on orthogonal surfaces of R3 and Joachimsthal Theorem. Civilizar, [S. l.], v. 5, n. 8, p. 63–76, 2005. DOI: 10.22518/16578953.800. Disponível em: https://revistas.usergioarboleda.edu.co/index.php/ccsh/article/view/800. Acesso em: 4 apr. 2025.