Fedunyk-Yaremchuk, O.V., and S.B. Hembars'ka. “Estimates of Approximative Characteristics of the Classes $B^{\Omega}_{p,\theta}$ of Periodic Functions of Several Variables With Given Majorant of Mixed Moduli of Continuity in the Space $L_{q}$”. Carpathian Mathematical Publications 11, no. 2 (December 31, 2019): 281–295. Accessed November 21, 2024. https://journals.pnu.edu.ua/index.php/cmp/article/view/2108.