ABDULLAYEV, F.; SERDYUK, Anatolii; SHIDLICH, A. Widths of functional classes defined by majorants of generalized moduli of smoothness in the spaces ${\mathcal S}^{p}$. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 73, n. 6, p. 723–737, 2021. DOI: 10.37863/umzh.v73i6.6432. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/6432. Acesso em: 11 apr. 2025.