Okafor, Sandra-Emmanuella C., et al. “Isolation and Screening of Escherichia Coli O157:H7 Bacteriophage: doi.org 10.26538 Tjnpr V4i11.6”. Tropical Journal of Natural Product Research (TJNPR), vol. 4, no. 11, Nov. 2020, pp. 880-3, https://tjnpr.org/index.php/home/article/view/949.