MyronyukV. V. 2012. “Approximation of the Classes $B^{\Omega}_{p, \theta}$ of Periodic Functions of Many Variables by Fourier Sums in the Space $L_p$ With $p = 1, \infty$”. Ukrains’kyi Matematychnyi Zhurnal 64 (9), 1204-13. https://umj.imath.kiev.ua/index.php/umj/article/view/2652.