SEMENYUK , V. B. Approximate of differentiated functions by polynomials on regions with external peaks . Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 44, n. 4, p. 534–540, 1992. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/7895. Acesso em: 7 apr. 2025.