1. Quantitative comparison of six nominally orthogonal vectorcardiographic systems;Beswick;Am. Heart J.,1964
2. A simple chest electrode for orthogonal vector-cardiography;Beswick;Am. Heart. J.,1964
3. Vectorcardiography in Normal Dogs Using the Frank Lead System;Bojrab;Am. J. Vet. Res.,1971
4. Ontogenetic changes in the QRS of the baboon vectorcardiogram;Cherkovich;Physiologia bohemoslov.,1967