M. . Nasir, Z. A. . Choudry, A. . Farooq, M. S. Iqbal, A. . Abbas, and M. . Ali, “Comparison of Early and Delayed Laparoscopic Cholecystectomy in Acute Cholecystitis”, apmc, vol. 15, no. 1, pp. 91–94, Mar. 2021.