El-Dib, Yusry O. “An Analytical Solution for Forcing Nonlinear Fractional Delayed Duffing Oscillator”. Journal of Applied Nonlinear Dynamics 10, no. 1 (March 1, 2021): 111–124. Accessed October 17, 2026. https://lhscientificpublishing.com/index.php/jand/article/view/599.