1. Sidney KH: Cardiovascular benefits of physical activity in the exercising aged, in American College of Sports Medicine: Exercise and Aging: The Scientific Basis, edited by Smith EL, Serfass RC. Hillside, NJ, Enslow Pubs Inc. 1981, pp 131–147
2. Shephard RJ: Cardiovascular limitations in the aged, in American College of Sports Medicine: Exercise and Aging: The Scientific Basis, edited by Smith EL, Serfass RC. Hillside, NJ, Enslow Pubs Inc. 1981, pp 19–29
3. Morse CE. Smith EL: Physical activity programming for the aged, in American College of Sports Medicine: Exercise and Aging: The Scientific Basis, edited by Smith EL, Serfass RC. Hillside, NJ, Enslow Pubs Inc. 1981, pp 109–120
4. Influence of age and sex on exercise cardiac output
5. Harris R: The Management of Geriatric Cardiovascular Disease. Philadelphia. J B Lippincott Co. 1970