B. Tang, MD; G. B. Hanna, PhD, FRCS; P. Joice, MA, MB ChB; A. Cuschieri, MD, FRSE Identification and Categorization of Technical Errors by Observational Clinical Human Reliability Assessment (OCHRA) During Laparoscopic Cholecystectomy „Arch Surg. 139 1215-1220[[Категорија:Cite journal]].”. Приступљено 4. 5. 2013.Сукоб URL—викивеза (помоћ)
