BABENKO, V. F.; KOFANOV, V. A.; PICHUGOV, S. A. On additive inequalities for intermediate derivatives of functions given on a finite interval. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 49, n. 5, p. 619–628, 1997. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/5042. Acesso em: 5 dec. 2025.