The tri-F titer: a rapid test for estimation of plasma fibrinogen and detection of fibrinolysis, fibrinogen) split products, and heparin - Lambert, C J; Marengo-Rowe, A J; Leveson, J; Alivizatos, P; Geisler, G F; Adam, M; Mitchel, B F; Thiele, J P (Ann Thorac Surg, 1974)