CHAICHENKO, S. O. Approximations by Fourier Sums on the Sets $L^{ψ} L^{P(∙)}$. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 66, n. 6, p. 835–846, 2014. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/2181. Acesso em: 14 apr. 2025.