GRIGORYAN, A. L. Estimate of the Remainder of the Best Quadratic Approximation of Differentiable Functions by Polynomials. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 56, n. 12, p. 1691–1698, 2004. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/3876. Acesso em: 5 dec. 2025.