AKHTER, M. G.; AHMAD, Z.; KHAN, K. A. Excel based finite difference modeling of ground water flow. Journal of Himalayan Earth Sciences, [S. l.], v. 39, n. 1, p. 49-53, 2006. Disponível em: http://ojs.uop.edu.pk/jhes/article/view/1607. Acesso em: 6 jan. 2025.