SEVOST'YANOV, E. A. On the normality of families of space mappings with branching. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 60, n. 10, p. 1389–1400, 2008. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/3253. Acesso em: 5 dec. 2025.