We establish the oscillation and asymptotic criteria for the second-order neutral delay differential equations with positive and negative coefficients having the forms and . The obtained new oscillation criteria extend and improve the recent results given in the paperof B. Karpuz et al. (2009).
Yuzhen Bai. Lihua Liu. "New Oscillation Criteria for Second-Order Neutral Delay Differential Equations with Positive and Negative Coefficients." Abstr. Appl. Anal. 2010 1 - 11, 2010. https://doi.org/10.1155/2010/564068