PACHPATTE, B. G. On trapezoid and Gr"uss like integral inequalities. Tamkang Journal of Mathematics, [S. l.], v. 34, n. 4, p. 356–370, 2003. DOI: 10.5556/j.tkjm.34.2003.238. Disponível em: https://journals.math.tku.edu.tw/index.php/TKJM/article/view/238. Acesso em: 27 apr. 2024.