1.
Hrabova UZ, Serdyuk AS. Order Estimates for the Best Approximations and Approximations by Fourier Sums of the Classes of (ψ, β)-Differential Functions. Ukr. Mat. Zhurn. [Internet]. 2013Sep.25 [cited 2024Apr.26];65(9):1186–1197. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/2500