THANDAPANI, E.; KUMAR, P. M. Oscillation and nonoscillation of nonlinear neutral delay difference equations. Tamkang Journal of Mathematics, [S. l.], v. 38, n. 4, p. 323–333, 2007. DOI: 10.5556/j.tkjm.38.2007.66. Disponível em: https://journals.math.tku.edu.tw/index.php/TKJM/article/view/66. Acesso em: 26 apr. 2024.