1. Confounding features of the classification of fibromyalgia;Bennett;J Rheumatol,1989
2. Physical and psychological considerations in the classification of fibromyalgia;Merskey;J Rheumatol,1989
3. Towards an integrated understanding of fibromyalgia syndrome I: medical and pathophysiological aspects;Boissevan;Pain,1991
4. Towards an integrated understanding of fibromyalgia syndrome II: psychological aspects;Boissevan;Pain,1991