7Geerts WH, Bergqvist D, Pines GF, et al. Prevention of venous thromboembolism: American CoUege of Chest Physicians Evidance-Based Clinical Practice Guidelines (sth Edition). Chest, 2008, 133(6 Suppl): S381-453.
8Geerts WH, Pineo GF, Heit JA, et al. Prevention of venous thromboembolism: the Seventh ACCP Conference on Antithrombotic and Thrombolytic Therapy. Chest, 2004, 126(3 Suppl): 338-400.
9Heit JA. Low-moleculer Weight heparin: The optimal duration of prophylaxis against postoperative venous thromboembolism after total hip or knee replasment. Thromb Res, 2001, 101(1): 163-173.