Fook, Tiaw Kah, and Zarina Bibi Ibrahim. “Block Backward Differentiation Formulas for Solving Second Order Fuzzy Differential Equations”. MATEMATIKA 33, no. 2 (December 27, 2017): 215–226. Accessed February 21, 2024. https://matematika.utm.my/index.php/matematika/article/view/868.