1. Clinical Electrocardiography: A Textbook;Bayes de Luna,1993
2. Practical electrocardiography;Marriot,1988
3. The alteration of T waves caused by a change in posture;Scherf;Am J Med Sciences,1943
4. Textbook of Electrocardiography;Littman,1972
5. Heart Disease: A Textbook of Cardiovascular Medicine;Braunwald,2001