MIR, A. On an operator preserving inequalities between polynomials. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 69, n. 8, p. 1061–1072, 2017. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/1758. Acesso em: 6 dec. 2025.