HEYDARBEYGI, Z.; AMYARI, M.; KHANEHGIR, M. Some refinements of numerical radius inequalities. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 72, n. 10, p. 1443–1451, 2020. DOI: 10.37863/umzh.v72i10.6027. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/6027. Acesso em: 11 apr. 2025.