ZHAO, F.-Z. . On the log-convexity of the difference sequence of a log-convex sequence. Sarajevo Journal of Mathematics, [S. l.], v. 16, n. 2, p. 153–162, 2022. DOI: 10.5644/SJM.16.02.02. Disponível em: https://sjm.anubih.ba/index.php/sjm/article/view/22. Acesso em: 15 oct. 2024.