1. Development of a universal language of pain syndromes;Merskey,1983
2. Pain: Historical changes in evaluation, treatment research into its mechanisms;Troehler;Eur J Rheumat Inflam,1981
3. Phantom body pain in paraplegics: Evidence for a central ‘pattern generating mechanism’ for pain;Melzack;Pain,1978
4. Pain: Introduction, Association for Research in Nervous and Mental Disease;Bonica,1981
5. International Classification of Diseases, 9th revision. Geneva, World Health Organization, 1978.