PACHPATTE, B. G. Some new Ostrowski and Gr"Uss type inequalities. Tamkang Journal of Mathematics, [S. l.], v. 38, n. 2, p. 111–120, 2007. DOI: 10.5556/j.tkjm.38.2007.82. Disponível em: https://journals.math.tku.edu.tw/index.php/TKJM/article/view/82. Acesso em: 27 apr. 2024.