Zafar Iqbal Malik, M.A.Nasir Malik, Omer Salahuddin, Muhammad Azhar, Omer Dilawar. 2009. “Micro Flora of Bile Aspirates in Symptomatic Cholelithiasis”. Journal of Rawalpindi Medical College 13 (1). https://journalrmc.com/index.php/JRMC/article/view/742.