et. al., K.F.F. 2021. Bifurcation of Periodic Solution in Singular Perturbed Parameterized Ordinary Differential Equation (ODEs). Turkish Journal of Computer and Mathematics Education (TURCOMAT). 12, 12 (May 2021), 493–500. DOI:https://doi.org/10.17762/turcomat.v12i12.7392.