M. A. Sholeh, K. Kuntaman, and U. Hadi, “Quantity of Antibiotic Use and Resistance Pattern of Gut Normal Flora Escherichia coli at Intensive Care Unit and Tropic Infection Ward, Dr Soetomo Hospital, Surabaya, Indonesia”, FMI, vol. 56, no. 3, pp. 159–164, Sep. 2020.