Motornyi, V.P. (2001) “Approximation of Certain Classes of Singular Integrals by Algebraic Polynomials”, Ukrains’kyi Matematychnyi Zhurnal, 53(3), pp. 331–345. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/4256 (Accessed: 5 December 2025).