Chauhan, S., Mahawal, B.S. and Ramola, D.C. 2017. Extended spectrum β-lactamases in urinary isolates of Escherichia coli - prevalence and susceptibility pattern at a tertiary care hospital. International Journal of Research in Medical Sciences. 3, 7 (Jan. 2017), 1622–1626. DOI:https://doi.org/10.18203/2320-6012.ijrms20150240.