Yakubu, D. G., U. I. Huoma, and A. M. Kwami. 2021. “Symmetric Two-Step Runge-Kutta Collocation Methods For Stiff Systems Of Ordinary Differential Equations”. Journal of the Nigerian Mathematical Society 33 (1-3):185-204. https://ojs.ictp.it/jnms/index.php/jnms/article/view/717.