1. A study of the electrical field surrounding active heart muscle;Craib;Heart,1927
2. Electrophysiology of the heart;Hoffman,1960
3. Atrial repolarization—its importance in clinical electrocardiography;Tranchesi;Circulation,1960
4. Grant's clinical electrocardiography. The spatial vector approach;Grant,1970
5. Ibidem: 68-72.