SERDYUK, A. S.; SOKOLENKO , I. V. Approximation by Fourier sums in classes of Weyl – Nagy differentiable functions with high exponent of smoothness. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 74, n. 5, p. 685–700, 2022. DOI: 10.37863/umzh.v74i5.7136. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/7136. Acesso em: 8 dec. 2025.