1. Upper extremity pain in the workplace: role of usage in causality;Armstrong,1987
2. Perceived exertion, a note on “history” and methods;Borg;Medicine and Science in Sports,1973
3. Perceived exertion related to heart rate and blood lactate during arm and leg exercise;Borg;European Journal of Applied Physiology and Occupational Psychology,1987
4. Epidemiological aspects of musculoskeletal disorders of the shoulder and upper limbs;Buckle,1990
5. Back symptoms in nursing aides in a geriatric hospital;Dehlin;Scandinavian Journal of Rehabilitation Medicine,1976