BABENKO, V. F.; KOFANOV, V. A.; PICHUGOV, S. A. Comparison of Exact Constants in Inequalities for Derivatives of Functions Defined on the Real Axis and a Circle. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 55, n. 5, p. 579–589, 2003. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/3934. Acesso em: 5 dec. 2025.