1.
Parhi N, Chand S. Oscillation of Second Order Neutral Delay Differential Equations With Positive and Negative Coefficients. JIMS [Internet]. 1999 Dec. 1 [cited 2024 Nov. 7];66(1-4):227-35. Available from: https://informaticsjournals.co.in/index.php/jims/article/view/22006