Gaudiani, V. A., G. L. Grunkemeier, L. J. Castro, A. L. Fisher, and Y. Wu. “The Risks and Benefits of Reoperative Aortic Valve Replacement”. The Heart Surgery Forum, vol. 7, no. 2, Jan. 2005, pp. E170-E173, doi:10.1532/HSF98.20041005.