DEMKIV, I. I. On properties of Bernstein-typ operator p0lynomials approximating the Urison operator. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 56, n. 9, p. 1172–1181, 2004. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/3833. Acesso em: 5 dec. 2025.