Some new sufficient conditions for oscillation of all solutions of the first-order linear neutral delay differential equations are obtained. Our new results improve many well-known results in the literature. Some examples are inserted to illustrate our results.
"Oscillation Criteria for Linear Neutral Delay Differential Equations of First Order." Abstr. Appl. Anal. 2013 1 - 5, 2013. https://doi.org/10.1155/2013/281581