GOLBERG , A. L. On certain classes of plane topological representations with the first generalized derivatives. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 44, n. 8, p. 1114–1116, 1992. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/8043. Acesso em: 17 apr. 2025.