1. A method for the accurate placement of chest electrodes in the taking of serial electrocardiographic tracings;Kerwin;Can Med Assoc J,1960
2. Differences caused by changes in electrode positions in two corrected orthogonal lead systems;Berson;J Electrocardiol,1970
3. Repeat variability of the normal orthogonal electrocardiogram and vectorcardiogram;Pipberger,1973
4. Effect of electrode displacement on orthogonal leads;Simonson,1966
5. Differences in vectorcardiographic parameters in the Frank lead system caused by systematic electrode dislocation;Greiser,1973