DRAGOMIR, S. S. On some inequalities in normed linear spaces. Tamkang Journal of Mathematics, [S. l.], v. 40, n. 3, p. 225–237, 2009. DOI: 10.5556/j.tkjm.40.2009.502. Disponível em: https://journals.math.tku.edu.tw/index.php/TKJM/article/view/502. Acesso em: 26 apr. 2024.