PACHPATTE, B. G. On a new generalization of Ostrowski type inequality. Tamkang Journal of Mathematics, [S. l.], v. 38, n. 4, p. 335-339, 2007. DOI: 10.5556/j.tkjm.38.2007.67. Disponível em: https://journals.math.tku.edu.tw/index.php/TKJM/article/view/67. Acesso em: 3 dec. 2021.