Fedorenko, A.S. and Fedorenko, O. (2004) “The Best $m$-Term Trigonometric Approximations of the Classes $L_{\beta ,p}^\Psi$ in Uniform Metric”, Ukrains’kyi Matematychnyi Zhurnal, 56(1), pp. 129–132. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/3735 (Accessed: 10 April 2025).