1. Development and evaluation of an impedance cardiac output system;Kubicek;Aerospace Med,1966
2. Non-invasive cardiovascular monitoring by electrical impedance technique;Mohapatra,1981
3. The Minnesota impedance cardiograph — theory and applications;Kubicek;Biomed Engin,1974
4. The calculation of cardiac stroke volume from variations in transthoracic electrical impedance;Cooley;Biomed Engin,1972