“Frequency and Antimicrobial Sensitivity Pattern of Extended Spectrum β-Lactamases Producing Escherichia coli and Klebsiella pneumoniae Isolated from urine at a Tertiary Care Hospital”, J Shaheed Suhrawardy Med Coll, vol. 4, no. 1, pp. 22–25, Oct. 2012, doi: 10.3329/jssmc.v4i1.11999.