“Frequency Locking and Bifurcation Analysis in Asymmetrically Forced Van Der Pol-DuffingModel of Glacial Cycles”. European Journal of Pure and Applied Mathematics 18, no. 4 (November 5, 2025): 6723. Accessed December 5, 2025. https://www.ejpam.com/index.php/ejpam/article/view/6723.