Koirala, Ashok, et al. “Single Dose Versus Multiple Dose Antibiotics in Laparoscopic Cholecystectomy: A Prospective Comparative Single Blind Study”. Journal of Society of Anesthesiologists of Nepal, vol. 5, no. 1, Mar. 2019, pp. 11-15, doi:10.3126/jsan.v5i1.23212.