NIGAM, H. K.; RANI, S. . Approximation of Functions in Besov Space. Tamkang Journal of Mathematics, [S. l.], v. 52, n. 3, p. 317-339, 2021. DOI: 10.5556/j.tkjm.52.2021.3270. Disponível em: https://journals.math.tku.edu.tw/index.php/TKJM/article/view/3270. Acesso em: 18 jan. 2022.