Khaliq, A., J. Ahmad, and S. Ahmad. “Potential of Chakdara Granite Gneiss for Fluorite Mineralization, an Assessment Study, District Dir, Northern Pakistan ”. Journal of Himalayan Earth Sciences, vol. 40, no. 1, Nov. 2007, pp. 45-49, http://ojs.uop.edu.pk/jhes/article/view/1615.