1.
Kofanov V. Bojanov–Naidenov problem for differentiable functions and the Erdös problem for polynomials and splines. Ukr. Mat. Zhurn. [Internet]. 2023 Mar. 2 [cited 2025 Dec. 5];75(2):182-97. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/7259