Javed, Yasir, et al. “COMPARISON BETWEEN HARMONIC ACE VERSUS CONVENTIONAL MONOPOLAR DIATHERMY IN LAPAROSCOPIC CHOLECYSTECTOMY IN TERMS OF GALLBLADDER PERFORATION”. Pakistan Armed Forces Medical Journal, vol. 66, no. Suppl-3, June 2020, pp. S258-62, https://pafmj.org/PAFMJ/article/view/5019.