1. Congress about the mitral valve;Bellhouse,1975
2. Echokardiographie zur Beurteilung der Arbeitswerte des linken Ventrikels mit dynamicher körperlicher Belastung;Bubenheimer;Sportarzt und Sportmedizin,1977
3. Origin and conduction of the mitral sound in the heart;Faber;Chirc. Res,1964
4. The isovolumic contraction time of the left ventricle. An echographic study;Hirschfeld;Circulation,1976
5. Temporal relations of the first heart sound to closure of the mitral valve;Laniado;Circulation,1973