1. Greenfield, L.J.: Pulmonary embolism: diagnosis and management. Curr. Probl. Surg.13:4, 1976
2. Piccone, V.A., Vidal, E., Yarnoz, M., Glass, B.S., LeVeen, H.H.: The late results of caval ligation. Surgery68:980, 1970
3. Moretz, W.H., Rhode, C.M., Shepard, M.H.: Prevention of pulmonary emboli by partial occlusion of the inferior vena cava. Am. Surg.25:617, 1959
4. Miles, R.M., Chappell, F., Renner, O.: A partially occluding vena caval clip for prevention of pulmonary embolism. Am. Surg.30:40, 1964
5. Elkins, R.C., McCurdy, J.R., Brown, P.P., Greenfield, L.J.: Clinical results with an extracaval prosthesis and description of a new intracaval filter. J. Okla. State Med. Assoc.66:53, 1973