POLYAKOV, O. V. On the Best (α;β)-Approximations of Convex Functions by Constants in Integral Metrics. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 65, n. 7, p. 1015–1020, 2013. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/2487. Acesso em: 5 dec. 2025.