KOLIHA, J. J.; PECARIC, J. Weighted Opial inequalities. Tamkang Journal of Mathematics, [S. l.], v. 33, n. 1, p. 83-92, 2002. DOI: 10.5556/j.tkjm.33.2002.308. Disponível em: https://journals.math.tku.edu.tw/index.php/TKJM/article/view/308. Acesso em: 3 dec. 2021.