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- Classification and diagnostic criteria for headache disorders, cranial neuralgias and facial pain - Oslo : Universitetsforlaget , 1988 - 96 s. (Cephalalgia; Vol. 8, Suppl. 7, 1988) [1, currently available 1]
- Chapters, articles
book
- Headache 1989 : Proceedings of the 4th internat. headache congress Sydney, Australia, 14-18 Oct. 1989 - Oslo : Universitetsforlaget , 1989 - 15, 464 s. (Cephalalgia; Vol. 9, Suppl. 10, 1989) [1, currently available 1]
- Chapters, articles
book