1. Ascah KJ, Stewart WJ, Jiang L, Guerrero JL, Newell JB, Gillam LD, Weyman AE (1985) A Doppler two dimensional echocardiographic method for quantitation of mitral regurgitation. Circulation 72: 377–383
2. Bargiggia GS, Tronconi L, Sahn DJ, Recusani F, Raisaro A, di Servi S, Valdes-Cruz LM, Montemartini C (1991) A new method for quantitation of mitral regurgitation based on color flow Doppler imaging of flow convergence proximal to regurgitant orifice. Circulation 84: 1481–1489
3. Becher H, Mintert C, Grube E, Lüderitz B (1989) Classification of mitral regurgitation by color flow mapping (CFM). Z Kardiol 78: 764–770
4. Blumlein S, Bouchard A, Schiller NB, Dae M, Byrd BF, Ports T, Botvinick EH (1986) Quantitation of mitral regurgitation by Doppler echocardiography. Circulation 74: 306–314
5. Bolger AF, Eigler LN, Maurer G (1988). Computer analysis of Doppler color flow mapping images for quantitative assessment of in vitro fluid jets. J Am Coll Cardiol 12: 450–457