N. Hussein, A., and M. Kareem Abass AL-Hassani. “Genotypical and Phenotypical Detection of Hemolysin Enzyme of Escherichia Coli Causing Urinary Tract Infections”. Al-Qadisiyah Journal of Pure Science, Vol. 22, no. 1, Apr. 2018, pp. 118 -28, https://journalsc.qu.edu.iq/index.php/JOPS/article/view/705.