Low dose heparin versus low molecular weight heparin (Kabi 2165, Fragmin) in the prophylaxis of thromboembolic complications of abdominal oncological surgery - Fricker, JP; Vergnes, Y; Schach, R; Heitz, A; Eber, M; Griinebaum, L; Wiesel, ML; Kher, A; Barbier, P; Cazenave, JP (Eur J Clinic Invest, 1988)