POLOVINA, A. A. Hausdorff diameter of a nonsymmetric class of vector functions. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 50, n. 11, p. 1570–1573, 1998. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/4812. Acesso em: 14 apr. 2025.