A. Koirala, D. Thakur, S. Agrawal, K. R. Pathak, M. Bhattarai, and A. Sharma, “Laparoscopic Cholecystectomy, A single Surgeon experience at Teaching Hospital Biratnagar, Nepal”, J Nobel Med Coll, vol. 6, no. 1, pp. 1–5, Aug. 2017.