On the convergence rate of d-dimensional fourth-order beta polynomial kernels. Recent Advances in Natural Sciences, [S. l.], v. 1, n. 2, p. 29, 2023. DOI: 10.61298/rans.2023.1.2.29. Disponível em: https://rans.nsps.org.ng/index.php/rans/article/view/29. Acesso em: 10 jan. 2025.