Abbasi, I. A., I. A. Abid, and M. A. Khan. “Statistical Study of the Dhok Pathan Formation, Puki Gudikhel, Durghar Range, Karak.”. Journal of Himalayan Earth Sciences, vol. 16, no. 1, Oct. 1983, pp. 85-96, http://ojs.uop.edu.pk/jhes/article/view/1213.