SERDYUK, A. S. Approximation of classes of analytic functions by Fourier sums in the metric of the space $L_p$. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 57, n. 10, p. 1395–1408, 2005. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/3693. Acesso em: 6 dec. 2025.