ENHANCED 3-POINT FULLY IMPLICIT SUPER CLASS OF BLOCK BACKWARD DIFFERENTIATION FORMULA FOR SOLVING STIFF INITIAL VALUE PROBLEMS. FJS [Internet]. 2021 Jul. 1 [cited 2025 Sep. 11];5(2):120-7. Available from: http://www.fjsadmin.fudutsinma.edu.ng/index.php/fjs/article/view/603