Qadir, A., Z. Ahmad, T. Khan, and M. Zafar. “Causes and Effects of Temporal Groundwater Level Change in the Alluvial Aquifer of Dera Ismail Khan Area, Pakistan”. Journal of Himalayan Earth Sciences, vol. 47, no. 2, Nov. 2014, pp. 185-91, http://ojs.uop.edu.pk/jhes/article/view/1711.