1. Alexander, W. R. M., J. M. Bremner, and J. J. R. Duthie: Incidence of the anti-nuclear factor in human sera. Ann. rheum. Dis. 19, 338?350 (1960).
2. Arnold, H. L., and I. L. Tilden: Fatal scleroderma with LE-phenomenon. Arch. Derm. Syph. (Chic.) 76, 427?430 (1957).
3. Bardawil, W. A., B. L. Toy, N. Galins, and T. B. Bayles: Disseminated lupus erythematosus, scleroderma and dermatomyositis as manifestations of sensitisation to DNA-protein. Amer. J. Path. 34, 607?629 (1958).
4. Beck, J. S., J. R. Anderson, K. G. Gray, and N. R. Rowell: Antinuclear and precipitating autiantibodies in progressive systemic sclerosis. Lancet 7319, 1188?1190 (1963).
5. Beickert, A.: Das Lupus erythematodes-Phänomen und die antinukleären Faktoren. Jena: Fischer 1963.