1. Activity guidelines for young patients with heart disease;Phys. Sportsmed.,1976
2. A study of changes in the spine in weight lifters and other athletes;Aggrawel;Br. J. Sports Med.,1979
3. American Medical Association, Committee on the Medical Aspect of Sports: Medical Evaluation of the Athlete: A Guide. Chicago, American Medical Association, 1976.
4. Growth in muscle strength and power;Asmussen,1973
5. The morbidity of cardiac nondisease in school children;Bergman;N. Eng. J. Med.,1967