Estimates of the best orthogonal trigonometric approximations of the generalized multidimensional analogues of the Bernoulli kernels and classes $L^\psi_{\beta,1}$ in the space $L_q$. ЗПІМ [Internet]. 2016 May 16 [cited 2026 Aug. 27];13(1):300-2. Available from: https://trim.imath.kiev.ua/index.php/trim/article/view/225