Dzyubenko, H. A. and Zalizko, V. D. (2005) “Pointwise Estimates for the Coconvex Approximation of Differentiable Functions”, Ukrains’kyi Matematychnyi Zhurnal, 57(1), pp. 47–59. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/3573 (Accessed: 3May2024).