SerdyukA. S., and SokolenkoI. V. 2019. “Approximation by Interpolation Trigonometric polynomials in Metrics of the Spaces $L_p$ on the Classes of Periodic Entire Functions”. Ukrains’kyi Matematychnyi Zhurnal 71 (2), 283-92. https://umj.imath.kiev.ua/index.php/umj/article/view/1438.