VOITOVYCH, V. A. Estimates for the Approximations of the Classes of Analytic Functions by Interpolation Analogs of the De-La-Vallée–Poussin Sums. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 66, n. 1, p. 49–62, 2014. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/2110. Acesso em: 5 dec. 2025.