1. Girard P, Musset D, Parent F, Maitre S, Philippoteau C, Simonneau G. High prevalence of detectable deep venous thrombosis in patient with acute pulmonary embolism. Chest 1999; 116:903-908.
2. Rosendaal FR. Venous Thrombosis: a multicausal disease. Lancet 1999; 353:1167-1173.
3. Ziomek S, Read RC, Tobler HG, Harrel JE, Gocio JC, Fink LM, Ranval TJ, Ferris EJ, Harshfield DL, McFarland DR. Thromboembolism in patients undergoing thoracotomy. Ann Thorac Surg 1993; 55(4): 223-226.
4. Nagahiro I. Andou A, Aoe M, Sano Y, Date H, Shimizu N. Intermittent pneumatic compression is effective in preventing symptomatic pulmonary embolism after thoracic surgery. Surg Today 2004; 34: 6-10.
5. Geerts W, Bergqvist D, Pineo G, Heit J, Samama C, Lassen M, Colwell C. Prevention of Venous Thromboembolism. Chest 2008; 133: 381S-453S.
6. Geerts W, Pineo GF, Heit JA, Bergqvist D, Lassen M, Colwell C, Ray JG. Prevention of venous thromboembolism: the Seventh ACCP Conference on Antithrombotic and Thrombolitic Therapy. Chest 2004; 126(3 Suppl): 338S-400S
7. Heit JA. Risk factors for venous thromboembolism. Clin Chest Med. 2003; 24(1): 1-12.
8. Gallus AS. Prevention of postoperative deep leg vein thrombosis in patients with cancer. Thromb Haemost 1997; 78: 126-32.
9. Kalweit G, Huwer H, Volmer I, Petzold T, Gams E. Pulmonary embolism: a frequent cause of acute fatality after lung resection. Eur J Cardiothorac Surg 1996; 10: 242-247.
10. Nurmohamed MT, Rosendal FR, Buller HR. Low-molecular-weight heparin versus standard heparin in general and orthopaedic surgery: a meta-analysis. Lancet 1992; 340: 152-156.
11. Jorgensen LN; Wille-Jorgensen P, Hauch O. Prophylaxis of postoperative thromboembolism with low molecular weight heparins. Br J Surg 1993; 80: 689-704.
12. Koch A, Ziegler S, Breitschwerdt H. Low molecular weight heparin and unfractionated heparin in thrombosis prophylaxis: meta-analysis based on original patient data. Thromb Res 2001; 102: 295-309.
13. Wille-Jorgensen P, Rasmussen MS, Andersen BR. Heparins and mechanical methods for thromboprofilaxis in colorectal surgery. Cochrane Database Syst Rev 2004; issue 1: article No. CD001217
14. Mismetti P, Laporte S, Darmon JY. Meta-analysis of low molecular weight heparin in the prevention of venous thromboembolism in general surgery. Br J Surg 2001; 88: 913-930.
15. Bergqvist D. Low molecular weight heparin for the prevention of venous thromboembolism after abdominal surgery. Br J Surg 2004; 91: 965-974.
16.  Leizorovicz A, Haugh MC, Chapuis FR. Low molecular weight heparin in prevention of perioperative thrombosis. BMJ 1992; 305: 913-920.
17. Koch A, Bouges S, Ziegler S. Low molecular weight heparin and unfractionated heparin in thrombosis prophylaxis after major surgical intervention: update of previous meta-analyses. Br J Surg 1997; 84: 750-759.
18. Palmer AJ, Schramm W, Kirchhof B. Low molecular weight heparin and unfractionated heparin for prevention of thrombo-embolism in general surgery: a meta-analysis of randomised clinical trials. Haemostasis 1997; 27: 65-74.
19. Breddin HK. Low molecular weight heparins in the prevention of deep-vein thrombosis in general surgery. Semin Thromb Haemost 1999; 25(suppl 3): 83-89.
20. Bergqvist D. Thrombosis prophylaxis – a comment. Lakartidningen. 2009; Oct 7-13; 106(41): 2624-2625.
 21. Bergqvist D, Burmark US, Frisell J. Low molecular weight heparin once daily compared with conventional low-dose heparin twice daily: a prospective double blind multicentre trial on prevention of postoperative thrombosis. Br J Surg 1986; 73: 204-208.
22. Bergqvist D, Matzsch T, Burmark US. Low molecular weight heparin given the evening before surgery compared with conventional low dose heparin in prevention of thrombosis. Br J Surg 1988; 75: 888-891.
23. McLeod RS, Geerts WH, Sniderman KW. Subcutaneous heparin versus low-molecular-weight heparin as thromboprophylaxis in patients undergoing colorectal surgery: results of the Canadian Colorectal DVT Prophylaxis Trial: a randomized, double-blind trial. Ann Surg 2001; 233: 438-444.