“Computation of Hopf Branches Bifurcating from a Hopf Pitchfork Point for Problems With $Z_2$-Symmetry”. Journal of Computational Mathematics 16, no. 5 (October 2, 1998): 403–416. Accessed December 5, 2025. https://www.global-sci.com/index.php/JCM/article/view/11289.