Badr, A.-A., E. Yousef, M. Kotb, and A. Deebis. “Beating-Heart Versus Conventional Mitral Valve Replacement; A Randomized Clinical Trial”. The Egyptian Cardiothoracic Surgeon, Vol. 2, no. 3, July 2020, pp. 90 -98, doi:10.35810/ects.v1i1.137.