2021. 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. 4, 4 (Jun. 2021), 477–483. DOI:https://doi.org/10.33003/fjs-2020-0404-505.