PICHUGOV, S. A. The Marchaud’s inequality for multiple modules of continuity in metric spaces. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 71, n. 12, p. 1712–1716, 2019. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/725. Acesso em: 7 apr. 2025.