CHAIKOVS’KYI, A. V. On some conditions for the second moduli of continuity. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 74, n. 9, p. 1291–1296, 2022. DOI: 10.37863/umzh.v74i9.7068. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/7068. Acesso em: 14 apr. 2025.