A. S. Serdyuk, “Approximation of Classes of Analytic Functions by Fourier Sums in Uniform Metric”, Ukr. Mat. Zhurn., vol. 57, no. 8, pp. 1079 – 1096, Aug. 2005, Accessed: Dec. 05, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/3666