TRIGUB, R. M. On the approximation of functions by polynomials and entire functions of exponential type. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 71, n. 2, p. 293–300, 2019. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/1439. Acesso em: 7 apr. 2025.