A decade of oral anticoagulant treatment to maintain autologous vein grafts for femoropopliteal atherosclerosis - Kretschmer, G; Herbst, F; Prager, M; Sautner, T; Wenzl, E; Berla-kovich, G A; Zekert, F; Marosi, L; Schemper, M (Arch Surg, 1992)