SHYDLICH, A. L. On Saturation of Linear Summation Methods for Fourier Series in the Spaces $S_{\varphi} ^p$. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 56, n. 1, p. 133–138, 2004. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/3736. Acesso em: 11 apr. 2025.