Serdyuk, .A.S. and Sokolenko , I.V. (2022) “Approximation by Fourier sums in classes of Weyl – Nagy differentiable functions with high exponent of smoothness”, Ukrains’kyi Matematychnyi Zhurnal, 74(5), pp. 685–700. doi:10.37863/umzh.v74i5.7136.