Wani, K. A., M. A. Thakur, F. A. Siraj, B. Fomdia, B. Gulnaz, and P. Maroof. “Extended Spectrum -Lactamase Mediated Resistance in Escherichia Coli in a Tertiary Care”. International Journal of Health Sciences, vol. 3, no. 2, July 2009, https://pub.qu.edu.sa/index.php/journal/article/view/4.