@article{Stepanets_1999, title={Rate of convergence of a group of deviations on sets of $\bar{\psi}$−integrals}, volume={51}, url={https://umj.imath.kiev.ua/index.php/umj/article/view/4771}, abstractNote={We study functionals that characterize the strong summation of Fourier series on sets of $\bar{\psi}$−integrals in the uniform and integral metrics. As a result, we obtain estimates exact in order for the best approximations of functions from these sets by trigonometric polynomials.}, number={12}, journal={Ukrains’kyi Matematychnyi Zhurnal}, author={Stepanets, O. I.}, year={1999}, month={Dec.}, pages={1673-1693} }