ILMURADOV, D. D. Category theorem on contingencies of hypersurfaces in Euclidean space. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 45, n. 3, p. 378–383, 1993. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/5819. Acesso em: 11 apr. 2025.