Akhter, M. Gulraiz, Zulfiqar Ahmad, and Khalid Amin Khan. “Excel Based Finite Difference Modeling of Ground Water Flow”. Journal of Himalayan Earth Sciences 39, no. 1 (November 30, 2006): 49-53. Accessed January 6, 2025. http://ojs.uop.edu.pk/jhes/article/view/1607.