3 Point Block Backward Differentiation Formula with Multiple Off-Step Points for the Solution of Stiff Problems. LJSIR [انترنت]. 6 يونيو، 2025 [وثق 17 مايو، 2026];3(2):53-8. موجود في: https://lafiascijournals.org.ng/index.php/ljsir/article/view/549