1.
Ellaggoune S, Fernane K. On the Number of Limit Cycles in a LiƩnard-Like Perturbation of a Non-linear Quadratic Isochronous Center. DNC [Internet]. 2026 Aug. 17 [cited 2026 Aug. 17];14(1):133-4. Available from: https://lhscientificpublishing.com/index.php/DNC/article/view/1502