[1]
H. A. Dzyubenko and V. D. Zalizko, “Pointwise Estimates for the Coconvex Approximation of Differentiable Functions”, Ukr. Mat. Zhurn., vol. 57, no. 1, pp. 47–59, Jan. 2005, Accessed: Feb. 17, 2026. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/3573