AbolarinO. E., OgunwareB. G., AdebisiA. F., and AyindeS. O. “DERIVATION AND IMPLEMENTATION OF A THREE-STEP HYBRID BLOCK ALGORITHM (TSHBA) FOR DIRECT SOLUTION OF LINEAR AND NONLINEAR SECOND ORDER ORDINARY DIFFERENTIAL EQUATIONS”. FUDMA JOURNAL OF SCIENCES, Vol. 4, no. 4, June 2021, pp. 477 -83, doi:10.33003/fjs-2020-0404-505.