Polyakov, O. V. (2013) “On the Best (α;β)-Approximations of Convex Functions by Constants in Integral Metrics”, Ukrains’kyi Matematychnyi Zhurnal, 65(7), pp. 1015–1020. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/2487 (Accessed: 25April2024).