Manan, F., M. A. Khan, A. Faraz, and M. Khan. “Frequency of Common Bacteria and Their Antibiotic Sensitivity in Patients With Symptomatic Cholelithiasis”. Journal of Postgraduate Medical Institute, vol. 28, no. 2, Apr. 2014, https://jpmi.org.pk/index.php/jpmi/article/view/1554.