Kofanov VA. Bojanov – Naidenov problem for the differentiable functions on the real line and the inequalities of various metrics. Ukr. Mat. Zhurn. [Internet]. 2019Jun.25 [cited 2024Apr.25];71(6):786-00. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/1476