1. Fibrositis or myofascial pain syndrome;American Rheumatism Association;Arthritis and Rheumatism,1976
2. Definitions and taxonomy of pain;Bonica,1990
3. Fibromyalgia;Bruusgaard;Scandinavian Journal of Social Medicine,1993
4. Assessment of nonariicular tenderness and prevalence of fibromyalgia in children;Buskila;Journal of Rheumatology,1993