Ahmed, I., S. Hamidullah, and N. Jehan. “Petrology of the Shewa-Shabazgarhi Igneous Complex, District Mardan, North Pakistan”. Journal of Himalayan Earth Sciences, vol. 23, no. 1, Nov. 1990, pp. 135-59, http://ojs.uop.edu.pk/jhes/article/view/1379.