[1]
R. V. Tovkach, “Approximation of some classes of periodic functions of many variables”, Ukr. Mat. Zhurn., vol. 62, no. 8, pp. 1149–1152, Aug. 2010, Accessed: Dec. 05, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/2945