Saha, M. R., and S. T. Jhora. “Detection of Extended Spectrum Beta-Lactamase Producing Gram-Negative Organisms: Hospital Prevalence and Comparison of Double Disc Synergy and E-Test Methods”. IMC Journal of Medical Science, vol. 12, no. 1, Jan. 2018, pp. 32-36, https://banglajol.info/index.php/IMCJMS/article/view/35176.