VAKARCHUK, S. B. The best polynomial approximation of functions analytical in the single circle . Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 42, n. 6, p. 838–843, 1990. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/8849. Acesso em: 14 apr. 2025.