H.Kamil, A., and K. H. Yasir. 2018. “Bifurcation of Solution in Singularly Perturbed ODEs by Using Lyapunov Schmidt Reduction”. University of Thi-Qar Journal of Science 6 (4): 145-52. https://doi.org/10.32792/utq/utjsci/v6i4.80.