Javed, A., F. A. Khan, J. Iqbal, A. B. Munshi, and I. Siddiqui. “Occurrence and Severity of Arsenic in Urine, Hair and Nails Through Contaminated Drinking Water in Pakistan”. Biological Sciences - PJSIR, vol. 51, no. 4, Aug. 2008, pp. 220-4, https://v2.pjsir.org/index.php/biological-sciences/article/view/672.