Hamidullah, S., M. Zahid, and M. Majid. “Mineralogy and Mineral Chemistry of the Amphibolite Belt and Main Mantle Thrust Rocks from Gantar Area, Allai Kohistan, North Pakistan”. Journal of Himalayan Earth Sciences, vol. 24, no. 1, Nov. 1991, pp. 133-46, http://ojs.uop.edu.pk/jhes/article/view/1397.