Alhassan, Buhari, Hamisu Musa, and Abasi Naghmeh. “Convergence and Order of the 2-Point Diagonally Implicit Block Backward Differentiation Formula With Two Off-Step Points”. UMYU Scientifica 1, no. 2 (December 30, 2022): 30–38. Accessed July 4, 2026. https://publications.umyu.edu.ng/scientifica/index.php/usci/article/view/424.