Kіbets V. F.; Mіklukhіn О. G. Extension of a theorem of S. N. Bernstein. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 18, n. 2, p. 141–142, 1966. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/8730. Acesso em: 6 dec. 2025.