SEVOST'YANOV, E. A. On branch points of three-dimensional mappings with unbounded characteristic of quasiconformality. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 63, n. 1, p. 69–79, 2011. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/2699. Acesso em: 14 apr. 2025.