1. Bestehorn HP, Meyer K, Reif A, Schwehr U (1992) Bewegungstherapie in besonderen Situationen. Herz Kreislauf 24: 296 - 297
2. Blumenthal DS, Weiss JL, Mellitis ED, Gerstenblith G (1981) The predictive value of a strongly positive stress test in patients with minimal symptoms. Am J Med 70: 1005 - 1012
3. Borg GA (1973) The perceived exertion: a note on »history« and methods. Med Sci Sports 5: 90 - 96
4. Fardy PS, Yanowitz FG (1995) Cardiac rehabilitation, adult fitness, and exercise testing. Williams & Wilkins, Baltimore, pp 328 - 362
5. Fletcher GF (1993) Exercise testing and cardiac rehabilitation. Cardiology clinics. Saunders, Philadelphia