Ismail, Fudziah, Mohamed Suleiman, and Bachok Taib. “Kaedah Ekstrapolasi Bagi Persamaan Pembezaan Biasa Peringkat Tinggi”. MATEMATIKA 7 (June 1, 1991): 11–29. Accessed November 22, 2024. https://matematika.utm.my/index.php/matematika/article/view/458.