1. Determination and modelling of lifting capacity;Ayoub;Final report HEW (NIOSH) Grant No. 5 ROIOH-00545-02,1978
2. The perception of effort — An inductive approach;Banister;European Journal of Applied Physiology,1979
3. Physical Performance and Perceived Exertion;Borg,1972
4. Perceived exertion as an indicator of somatic stress;Borg;Scandinavian Journal of Rehabilitation Medicine,1970
5. Effort in sustained and phasic handgrip contractions;Cain;American Journal of Psychology,1971