NIGAM, H. K. Best approximation of conjugate of a function in generalized Zygmund. Tamkang Journal of Mathematics, [S. l.], v. 50, n. 4, p. 417–427, 2019. DOI: 10.5556/j.tkjm.50.2019.3006. Disponível em: https://journals.math.tku.edu.tw/index.php/TKJM/article/view/3006. Acesso em: 28 mar. 2024.