1.
Pulsed Doppler echocardiographic indices for assessing mitral regurgitation
by Veyrat, C
British Heart Journal, 1984-02, Vol.51 (2), p.130-138

2.
Non-invasive recording of mitral valve flow velocity patterns using pulsed Doppler echocardiography. Application to diagnosis and evaluation of mitral valve disease
by Kalmanson, D
British Heart Journal, 1977-05, Vol.39 (5), p.517-528
