SEVOST'YANOV, E. A.; SKVORTSOV, S. A. On convergence of mappings in metric spaces with direct and inverse modulus conditions. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 70, n. 7, p. 952–687, 2018. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/1608. Acesso em: 5 dec. 2025.