SEVOST'YANOV, E. A. On the openness and discreteness of mappings with unbounded characteristic of quasiconformality. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 63, n. 8, p. 1128–1134, 2011. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/2789. Acesso em: 17 apr. 2025.