BABENKO, V. F.; KOFANOV, V. A.; PICHUGOV, S. A. Comparison of approximation properties of generalized polynomials and splines. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 50, n. 8, p. 1011–1020, 1998. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/4850. Acesso em: 5 dec. 2025.