BECKER, Leigh C.; BURTON, T. A. Jensen’s Inequality and Liapunov’s Direct Method. CUBO, A Mathematical Journal, [S. l.], v. 6, n. 3, p. 67–90, 2004. Disponível em: https://cubo.ufro.cl/index.php/cubo/article/view/1634. Acesso em: 3 nov. 2025.