ZELINSKII, Yu. B. On domains with regular sections. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 57, n. 10, p. 1420–1423, 2005. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/3696. Acesso em: 5 dec. 2025.