Suman Verma, Sandeep Kumar, Everest Shiwach, and Pramod Kumar. “Hazardous Heavy Metal Pollution: Challenges and Solutions”. International Journal of Engineering and Management Research, vol. 8, no. 5, Oct. 2018, pp. 229-33, https://ijemr.vandanapublications.com/index.php/ijemr/article/view/660.