Jan, M. Q., M. Kamal, and A. A. Qureshi. “Petrography of the Loe Shilman Carbonatite Complex, Khyber Agency”. Journal of Himalayan Earth Sciences, vol. 14, no. 1, Mar. 1981, pp. 29-43, http://ojs.uop.edu.pk/jhes/article/view/1154.