VAKARCHUK, S. B.; ZHIR, S. I. On the best polynomial approximation of entire transcendental functions of generalized order. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 60, n. 8, p. 1011–1026, 2008. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/3219. Acesso em: 6 dec. 2025.