SerdyukA. S. “Approximation by Interpolation Trigonometric Polynomials on Classes of Periodic Analytic Functions”. Ukrains’kyi Matematychnyi Zhurnal 64, no. 5 (May 25, 2012): 698-712. Accessed November 22, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/2609.