Shirinbekov М. On holomorphicity shells of a class of regions. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 18, n. 4, p. 134–137, 1966. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/8325. Acesso em: 6 dec. 2025.