1. “The Different Forms of the Electrocardiogram and Their Signification,”;Einthoven;Lancet,1912
2. “Electrocardiograms that Represent the Potential Variations of a Single Electrode,”;Wilson;Am. Heart J,1934
3. “Relations Between the Potential Variations of the Ventricular Surfaces and the Form of the Ventricular Electrocardiogram in Leads from the Precordium and the Extremities,”;Wilson;Tr. Assoc. Am. Physicians,1941
4. “Electrocardiographic Studies in Normal Infants and Children,”;Ziegler,1951
5. “Characteristics of the Unipolar Precordial Electrocardiogram in Infants,”;Ziegler;Circ,1951