IGNATENKO, V. F. Diametral theory of algebraic surfaces and geometric theory of invariants of groups generated by reflections. I. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 50, n. 5, p. 639–653, 1998. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/4902. Acesso em: 5 dec. 2025.