Singh, Preeti, et al. “Live/Real/Time/Three-Dimensional/Transesophageal/Echocardiographic/Evaluation/of/Mitral/and/Aortic/Valve/Prosthetic/Paravalvular/Regurgitation”. Cardiovascular Journal, vol. 2, no. 2, Dec. 2010, pp. 121-7, doi:10.3329/cardio.v2i2.6627.