Best Approximation of Unbounded Functions by Modulus of Smoothness. European Journal of Pure and Applied Mathematics, Maryland, USA, v. 16, n. 2, p. 944–952, 2023. DOI: 10.29020/nybg.ejpam.v16i2.4730. Disponível em: https://www.ejpam.com/index.php/ejpam/article/view/4730. Acesso em: 22 dec. 2024.