We are concerned with oscillation of the first order neutral delay differential equation with constant coefficients, and we obtain some necessary and sufficient conditions of oscillation for all the solutions in respective cases and .
Songbai Guo. Youjian Shen. Binbin Shi. "Necessary and Sufficient Conditions of Oscillation in First Order Neutral Delay Differential Equations." Abstr. Appl. Anal. 2014 (SI18) 1 - 5, 2014. https://doi.org/10.1155/2014/623713