Ughamba, K. T., I. C. Ugochukwu, and C. U. Anyanwu. “Antibiotic and Heavy Metal Tolerance in Bacteria Isolated from Drinking Water Sources in Nsukka Metropolis, Enugu State, Nigeria”. Journal of Basic Pharmacology and Toxicology, Vol. 3, no. 2, Dec. 2019, pp. 1-5, http://scigreen.com/index.php/JBPT/article/view/59.