Serdyuk AS, Sokolenko IV. Approximation by Fourier sums in classes of differentiable functions with high exponents of smoothness. MFAT [Internet]. 2019 Dec. 25 [cited 2025 Dec. 15];25(4):381-7. Available from: https://zen.imath.kiev.ua/index.php/mfat/article/view/740