1. An accurate, clinically practical system for spatial vectorcardiography;Frank;Circulation,1956
2. Electrocardiographic data processing: What does the future hold?;Pipberger,1978
3. Computers in clinical electrocardiology. Is vectorcardiography becoming obsolete?;Rautaharju,1978
4. The current state of computer ECG analysis: a critique;Rautaharju,1977
5. Diagnostic classifications of orthogonal electrocardiograms and vectorcardiograms;Pipberger,1971