Alhassan Buhari, Hamisu Musa and Naghmeh Abasi 2022. Convergence and Order of the 2-Point Diagonally Implicit Block Backward Differentiation Formula with Two Off-Step Points. UMYU Scientifica. 1, 2 (Dec. 2022), 30–38. DOI:https://doi.org/10.56919/usci.1222.004.