AHMED, I.; MA’ALI, A. I.; AGBOLUAJE, A. A.; JIKANTORO, Y. D. A FOUR-STEP BLOCK HYBRID BACKWARD DIFFERENTIATION FORMULAE FOR THE SOLUTION OF GENERAL SECOND ORDER ORDINARY DIFFERENTIAL EQUATION. FUDMA JOURNAL OF SCIENCES, v. 9, n. 4, p. 239 - 244, 30 Apr. 2025.