1. Aerobic work capacity in men and women with special reference to age;Åstrand;Acta Physiol. Scand.,1960
2. Perceived exertion: a note on ‘history’ and methods;Borg;Med. Sci. Sports,1973
3. The Physiology of Breathing. A textbook for medical students;Bouhuys,1977
4. The relationship of the sensation of breathlessness to the act of breathing;Campbell,1966
5. The Respiratory Muscles;Campbell,1970