B. KAMARAJ; R. VASUKI. Oscillation Criteria of Second Order Difference Equation With Negative Nonlinear Neutral Term. International Journal of Mathematics And its Applications, [S. l.], v. 5, n. 2 - C, p. 411–419, 2017. Disponível em: http://ijmaa.in/index.php/ijmaa/article/view/835. Acesso em: 18 may. 2024.