NITIEMA, P. K. On the best $L_1$-approximation of truncated powers by algebraic polynomials. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 50, n. 4, p. 593–598, 1998. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/4930. Acesso em: 5 dec. 2025.