Shkapa, V. V. (2015) “Approximating Characteristics of the Classes $L_{β,p}^{ψ}$ of Periodic Functions in the Space $L_q$”, Ukrains’kyi Matematychnyi Zhurnal, 67(8), pp. 1139-1150. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/2052 (Accessed: 29March2024).