DRAGOMIR, S. S.; MCANDREW, A. On trapezoid inequality via Gruss type result and applications. Tamkang Journal of Mathematics, [S. l.], v. 31, n. 3, p. 193–202, 2000. DOI: 10.5556/j.tkjm.31.2000.393. Disponível em: https://journals.math.tku.edu.tw/index.php/TKJM/article/view/393. Acesso em: 26 apr. 2024.