1. Variations in commercial heparin and its relation to the problem of heparin standardization for clinical use;Jaques;Thromb Res,1973
2. Preliminary report on postoperative treatment with heparin as a prevention of thrombosis;Crafoord;Acta Chir Scand,1937
3. Heparin and thrombosis of veins following injury;Murray;Surgery,1937
4. Heparin tolerance: a test of the clotting mechanism;de Takats;Surg Gynecol Obstet,1943
5. A sensitized clotting time;de Takats;JAMA,1951