Biological and thrombolytic properties of pro-enzyme and active forms of human urokinase – I. Fibrinolytic and fibrinogenolytic properties in human plasma in vitro of urokinases obtained from human urine or by recombinant DNA technology - Zamarron, C; Lijnen, H R; Hoef, B v; Collen, D (Thromb Haemostas, 1984)