CHENG, S. S.; ZHANG, B. G.; XIE, S.-L. QUALITATIVE THEORY OF PARTIAL DIFFERENCE EQUATIONS (IV): FORCED OSCILLATIONS OF HYPERBOLIC TYPE NONLINEAR PARTIAL DIFFERENCE EQUATIONS. Tamkang Journal of Mathematics, [S. l.], v. 26, n. 4, p. 337–360, 1995. DOI: 10.5556/j.tkjm.26.1995.4414. Disponível em: https://journals.math.tku.edu.tw/index.php/TKJM/article/view/4414. Acesso em: 26 apr. 2024.