1. Angell WW, Angell JD, Kosek JC: The current status of porcine xenograft valve replacement. Prog Cardiovasc Dis (in press)
2. The Angell-Shiley porcine xenograft;Angell;Ann Thorac Surg,1979
3. Heart valve replacement with Hancock bioprosthesis: analysis of long-term results;Cevese;Circulation,1976
4. Aortic valve replacement with the Hancock porcine xenograft;Cohn;Ann Thorac Surg,1976
5. Experience with the Hancock porcine xenograft for mitral valve replacement;Davila,1977