PARFINOVYCH, N. V. On the Exact Asymptotics of the Best Relative Approximations of Classes of Periodic Functions by Splines. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 53, n. 4, p. 489–500, 2001. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/4270. Acesso em: 14 apr. 2025.