Komaria, K., A. Halim R, A. Nst, and H. Hasan. “Predictor of Left Atrial Spontaneous Echocardiographic Contrast in Rheumatic Mitral Stenosis Patients”. Indonesian Journal of Cardiology, Vol. 38, no. 3, Sept. 2017, pp. 168-7, doi:10.30701/ijc.v38i3.780.