“Estimates for the best $M$-term trigonometric approximations of classes $L_{\beta,p}^\psi$ of periodic multivariable functions in the case of small smoothness in the space $L_q$”, ЗПІМ, vol. 14, no. 3, pp. 293–318, Nov. 2017, Accessed: Sep. 11, 2026. Available: https://trim.imath.kiev.ua/index.php/trim/article/view/324