Myronyuk, V.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 (Sep. 2012), 1204-1213.