1. Rheumatoid Arthritis. Etiology, Diagnosis, Management (Eds. P. D. Utsinger, N. J. Zvaifler, and G. E. Ehrlich), Lippincott (1985).
2. Trace Elements in the Pathogenesis and Treatment of Inflammation (Eds. K. D. Rainsford, K. Brune, and M. W. Whitehouse). Agents and Actions Supps. v. 8 Birkhauser Verlag (1981).
3. K. Landé: Munch. Med. Wochenschr.
74, 1132 (1927).
4. J. Forestier: Bull. Soc. Med. Hop. Paris
44, 323 (1929).
5. Empire Rheumatism Council: Ann. Rheum. Dis.
20, 315 (1961).