1. American College of Sports Medicine;Med. Sci. Sports & Exerc; Position statement on the recommended quantity and quality of exercise for developing and maintaining fitness in healthy adults,1978
2. The effect of age and sex on the perceptioin of effort during exercise test with a linear increase in heart rate;Arstila, M.; Antilla, K.; Wendelin, H.; Vuori, I.; Valamaki, F.,1977
3. Paediatric Sports Medicine for the Practitioner;Bar-Or, O.,1983
4. Physiological and perceptual indicators of physical stress in 41 to 60 year-old men who vary in conditioning level and body fat;Bar-Or, O.; Skinner, J.S.; Buskirk, E.R.; Borg, G.;Med. Sci.in Sports,1972
5. Perceived exertion as an indicator of somatic stress;Borg, G.;Scand. J. Rehab. Med,1970