Non-Perturbative Approach in Scrutinizing Nonlinear Time-Delay of Van der Pol-Duffing Oscillator. Eur. J. Pure Appl. Math. [Internet]. 2025 Jan. 31 [cited 2026 Feb. 23];18(1):5495. Available from: https://www.ejpam.com/ejpam/article/view/5495