Jeffrey S. Borer, John F. Brensike, David R. Redwood, Samuel B. Itscoitz, Eugene R. Passamani, Neil J. Stone, John M. Richardson, Robert I. Levy, Stephen E. Epstein,
Limitations of the Electrocardiographic Response to Exercise in Predicting Coronary-Artery Disease New England Journal of Medicine. ,vol. 293, pp. 367- 371 ,(1975) ,
10.1056/NEJM197508212930801