MOTORNYI, V. P.; PAS'KO, A. N. Estimates for the best asymmetric approximations of asymmetric classes of functions. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 63, n. 6, p. 798–808, 2011. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/2763. Acesso em: 5 dec. 2025.