EHIGIE, J. O., S. N. JATOR, and S. A. OKUNUGA. “A CONTINUOUS RUNGE-KUTTA-NYSTR¨OM COLLOCATION METHOD WITH TRIGONOMETRIC COEFFICIENTS FOR PERIODIC INITIAL VALUE PROBLEMS”. Journal of the Nigerian Mathematical Society 36, no. 1 (July 15, 2017): 139–162. Accessed April 18, 2024. https://ojs.ictp.it/jnms/index.php/jnms/article/view/92.