1) Hart, D. A., Kramer, M. and Chieplak, W.: Identification of subpopulation of human urinary plasminogen activators. Thromb. Haemostas., 51; 212-216, 1984.
2) Cieplak, W. and Hart, D. A.: Formation of stable complex between urokinase and a human urinary component. Thromb. Haemostas., 53; 36-41, 1985.