A.J. McMahon, J.N. Baxter, J.R. Anderson, G. Ramsay, P.J. O'Dwyer, I.T. Russell, S. Ross, G. Sutherland, D. Galloway, C.G. Morran,
Laparoscopic versus minilaparotomy cholecystectomy : a randomised trial The Lancet. ,vol. 343, pp. 135- 138 ,(1994) ,
10.1016/S0140-6736(94)90932-6