Zbar, N. S., A. W. B. Al-Shaibani, and H. M. Jasim. “Optimum Conditions for Glutaminase Production by Serratia Marcescens N1”. Al-Nahrain Journal of Science, Vol. 17, no. 2, July 2018, pp. 147-53, https://anjs.edu.iq/index.php/anjs/article/view/454.