1. Muscle fatigue;Asmussen;Medicine and Science in Sports,1979
2. Heart rate and ECG responses of fire fighters;Barnard;Journal of Occupational Medicine,1975
3. What do we call fatigue?;Bartley,1976
4. Fatigue and Impairment in Man;Bartley,1947
5. Muscles Alive;Basmajian,1985