Jan, M. Q., and A. Z. Tahirkheli. “The Tora Tigga Complex, Southern Dir, NW Pakistan, An Example of Mafic-Ultramafic Rocks in The Bottom of an Island Arc”. Journal of Himalayan Earth Sciences, vol. 23, no. 1, Nov. 1990, pp. 231-5, http://ojs.uop.edu.pk/jhes/article/view/1385.