"UpToDate". www.uptodate.com. Retrieved 17 August 2024. https://www.uptodate.com/contents/exercise-capacity-and-vo2-in-heart-failure/print ↩
Goldstein, Robert E. (1990). "Exercise Capacity". Clinical Methods: The History, Physical, and Laboratory Examinations (3rd ed.). Butterworths. ISBN 978-0-409-90077-4. 978-0-409-90077-4 ↩