LI, W. R.; CHENG, S. S. Wendroff type inequalities for nonlinear hyperbolic equations. Tamkang Journal of Mathematics, [S. l.], v. 32, n. 4, p. 327–333, 2001. DOI: 10.5556/j.tkjm.32.2001.347. Disponível em: https://journals.math.tku.edu.tw/index.php/TKJM/article/view/347. Acesso em: 18 apr. 2024.