FEDORENKO, A. S.; FEDORENKO, O.S. The Best $m$-Term Trigonometric Approximations of the Classes $L_{\beta ,p}^\Psi$ in Uniform Metric. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 56, n. 1, p. 129–132, 2004. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/3735. Acesso em: 5 dec. 2025.