ADEGBOYE, Z. A., Y. A. YAHAYA, and U. I. AHMED. 2020. “DIRECT INTEGRATION OF GENERAL FOURTH ORDER ORDINARY DIFFERENTIAL EQUATIONS USING FIFTH ORDER RUNGE-KUTTA METHOD”. Journal of the Nigerian Mathematical Society 39 (1):69-78. https://ojs.ictp.it/jnms/index.php/jnms/article/view/545.