Izah, S., T. Angaye, and E. Ohimain. “Estimation of Potential Chronic Daily Intake of Heavy Metal through Consumption of Potable Water in South-South Nigeria”. Bulletin of Advanced Scientific Research, Vol. 1, no. 1, May 2015, pp. 33-36, http://asdpub.com/index.php/basr/article/view/127.