Motornyi, V. P. 2008. “On the Problem of Approximation of Functions by Algebraic Polynomials With Regard for the Location of a Point on a Segment”. Ukrains’kyi Matematychnyi Zhurnal 60 (8): 1087–1098. https://umj.imath.kiev.ua/index.php/umj/article/view/3226.