Goksel, O. S., K. Inan, T. Tatar, A. Ucak, G. Arslan, M. Us, and A. T. Yilmaz. “Mitral Valve Replacement With Bileaflet Preservation for Complex Annular Calcification”. The Heart Surgery Forum, vol. 11, no. 1, Feb. 2008, pp. E1-E3, doi:10.1532/HSF98.20071164.