W. Schwenk, O. Haase, J. Neudecker, and J. M. Muller,“Short term benefits for laparoscopic colorectal resection,” Cochrane Database of Systematic Reviews 2005, Issue 2. Art. No.: CD003145. DOI: 10.1002/14651858.CD003145.pub2.
F. Keus, J. A. F de Jong, H. G. Gooszen, and CJHM. van Laarhoven, Laparoscopic versus open cholecystectomy for patients with symptomatic cholecystolithiasis. Cochrane Database of Systematic Reviews 2006, Issue 4. Art. No.: CD006231. DOI: 10.1002/14651858. CD006231.