CHO, N. E.; KIM, I. H. ANGULAR ESTIMATES OF CERTAIN INTEGRAL OPERATORS. Tamkang Journal of Mathematics, [S. l.], v. 29, n. 4, p. 271–277, 1998. DOI: 10.5556/j.tkjm.29.1998.4255. Disponível em: https://journals.math.tku.edu.tw/index.php/TKJM/article/view/4255. Acesso em: 27 apr. 2024.