Fedunyk-Yaremchuk, O. and Hembars’ka, S. 2021. Approximation of classes of periodic functions of several variables with given majorant of mixed moduli of continuity. Carpathian Mathematical Publications. 13, 3 (Dec. 2021), 838–850. DOI:https://doi.org/10.15330/cmp.13.3.838-850.