Illahi, Ramadian Ridho, Marzuki Marzuki, and Lalu Sahrul Hudha. “Solution of The Duffing Equation Using Exponential Time Differencing Method”. EIGEN MATHEMATICS JOURNAL 7, no. 1 (February 15, 2024): 16–18. Accessed May 10, 2024. https://eigen.unram.ac.id/index.php/eigen/article/view/195.