We present new oscillation criteria for the even order neutral delay differential equations with distributed deviating argument , where . Assumptions in our theorems are less restrictive, whereas the proofs are significantly simpler compared to those by Wang et al. (2005).
Siyu Zhang. Fanwei Meng. "Oscillation Criteria for Even Order Neutral Equations with Distributed Deviating Argument." Int. J. Differ. Equ. 2010 (SI2) 1 - 14, 2010. https://doi.org/10.1155/2010/308357