FAYYADH, M. H.; AUAD, A. A. Trigonometric Approximation by Modulus of Smoothness in Lp,α (X). Al-Mustansiriyah Journal of Science, [S. l.], v. 32, n. 3, p. 20–25, 2021. DOI: 10.23851/mjs.v32i3.953. Disponível em: https://mjs.uomustansiriyah.edu.iq/index.php/MJS/article/view/953. Acesso em: 1 apr. 2023.