KOFANOV, V. A. The Bojanov – Naidenov problem for functions with nonsymmetric restrictions on the highest derivative. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 71, n. 3, p. 368–381, 2019. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/1445. Acesso em: 27 apr. 2025.