Khan, Mohammad Asif, M. Qasim Jan, M. Sufyan Qazi, M. Ahmed Khan, Yaqoob Shah, and Ashfaq Sajjad. 1995. “Geology of the Drainage Divide Between Kohistan and Kaghan, N. Pakistan”. Journal of Himalayan Earth Sciences 28 (1):65-77. http://ojs.uop.edu.pk/jhes/article/view/1476.