YANG, G.-S.; HUANG, S.-F. ON FINITE DIFFERENCE INEQUALITY OF LYAPUNOV TYPE. Tamkang Journal of Mathematics, [S. l.], v. 23, n. 3, p. 213–221, 1992. DOI: 10.5556/j.tkjm.23.1992.4544. Disponível em: https://journals.math.tku.edu.tw/index.php/TKJM/article/view/4544. Acesso em: 25 apr. 2024.