Moussa, B., Youssouf, M., Abdoul Wassiha, N. and Youssouf, P. (2024) “HOMOTOPY PERTURBATION METHOD TO SOLVE DUFFING-VAN DER POL EQUATION”, Advances in Differential Equations and Control Processes, 31(3), pp. 299-315. doi: 10.17654/0974324324016.