E. Donmez, T. Seker, Y. K. Icen, Z. Elbasan, M. Gur, and M. Cayli, “Incidental Asymptomatic Accessory Mitral Valve: a Differential Diagnosis for Intracardiac Mass”, Acta Med Port, vol. 27, no. 6, pp. 779–782, Dec. 2014.