Khan, I., T. Aziz, A. Khan, and S. M. El-Sayed. “SPLINE FINITE DIFFERENCE METHOD FOR A CLASS OF BOUNDARY-VALUE PROBLEMS”. Journal of the Indonesian Mathematical Society 14, no. 1 (June 3, 2012): 57–62. Accessed October 5, 2024. http://jims-a.org./index.php/jimsa/article/view/63.