DERIVATION AND IMPLEMENTATION OF A THREE-STEP HYBRID BLOCK ALGORITHM (TSHBA) FOR DIRECT SOLUTION OF LINEAR AND NONLINEAR SECOND ORDER ORDINARY DIFFERENTIAL EQUATIONS. FJS [Internet]. 2021 Jun. 14 [cited 2025 Sep. 3];4(4):477-83. Available from: https://fjs.fudutsinma.edu.ng/index.php/fjs/article/view/505