Nwanyanwu CE, N. CO, and O. JC. “Growth Responses of Petroleum Refinery Effluent Bacteria to Phenol”. Journal of Research in Biology, Vol. 2, no. 3, Mar. 2012, pp. 167-7, https://ojs.jresearchbiology.com/ojs1/index.php/jrb/article/view/191.