“Necessary and Sufficient Conditions for Oscillations of Neutral Hyperbolic Partial Differential Equations with Delays”, J. Part. Diff. Eq., vol. 19, no. 4, pp. 319–324, May 2020, Accessed: Dec. 05, 2025. [Online]. Available: https://global-sci.com/index.php/jpde/article/view/4080