Cherneі N. I. Criteria of stability of convexity of a region in one-sheeted conformal mappings. II . Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 18, n. 5, p. 84–93, 1966. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/8443. Acesso em: 11 apr. 2025.