D. S. . Shil, D. A. D. . Sarma, D. M. A. . Islam, D. M. A.-H.-B. . Abdul, and D. . Begum, “Laparoscopic Cholecystectomy for Acute Cholecystitis: Indication, Risk, and Outcome”, ijmsci, vol. 8, no. 06, pp. 5508–5513, Jun. 2021.