SAVCHUK, V. V. Best approximation by holomorphic functions. Application to the best polynomial approximation of classes of holomorphic functions. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 59, n. 8, p. 1047–1067, 2007. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/3369. Acesso em: 6 dec. 2025.