DRAGOMIR, S. S.; MILOSEVIC, D. M. Some Refinements of Hadamard’s Inequalities. The Journal of the Indian Mathematical Society, [S. l.], v. 66, n. 1-4, p. 97–104, 1999. Disponível em: https://informaticsjournals.com/index.php/jims/article/view/21958. Acesso em: 7 may. 2024.