1. Establishment of a laparoscopic cholecystectomy training program;Bailey;Ann Surg,1991
2. Halstedian technique revisited: Innovations in teaching surgical skills;Barnes;Ann Surg,1989
3. Learning basic and advanced laparoscopic surgery;Batt,1991
4. Laparoscopic cholecystectomy: Mini-access surgery—reality or utopia?;Berci;Postgrad Gen Surg,1990