MOTORNA, O. V.; SHEVCHUK , V. I. On one Reverse asymptotic equality. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 74, n. 4, p. 572–576, 2022. DOI: 10.37863/umzh.v74i4.7111. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/7111. Acesso em: 8 dec. 2025.