DRAGOMIR, S. S.; SOFO, A. An integral inequality for twice differentiable mappings and applications. Tamkang Journal of Mathematics, [S. l.], v. 31, n. 4, p. 257-266, 2000. DOI: 10.5556/j.tkjm.31.2000.382. Disponível em: https://journals.math.tku.edu.tw/index.php/TKJM/article/view/382. Acesso em: 25 jul. 2021.