Ahmad, B.B., Tsafe, A. I., Uba, S., and Aliyu, S. “Analysis of Heavy Metals in Water Around Gidan Saru Mining Site, Zamfara State, Nigeria”. International Journal of Science for Global Sustainability, vol. 2, no. 3, Sept. 2016, p. 9, https://fugus-ijsgs.com.ng/index.php/ijsgs/article/view/232.