Biological and thrombolytic properties of proenzyme 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.; Van Hoef,B.; Collen,D. (Thromb Haemost, 1984)