1. On the electromotive changes connected with the beat of the mammalian heart, and of the human heart in particular;Waller,1889
2. On the direction and manifest size of the variations of potentials in the human heart and on the influence of the position of the heart on the form of the electrocardiogram;Einthoven;Arch. ges. Physiol.,1913
3. Electrocardiograms that represent the potential variations of a single electrode;Wilson;Am. Heart J.,1934
4. A History of Electrocardiography;Burch,1964