1. Amos, D. B. (1974). National Institutes of Health Bulletin, 23.
2. Boyum, A. (1968). Scandinavian Journal of Clinical and Laboratory Investigation, 21, Suppl. 97, 31.
3. Brewer, E. J., Bass, J. C., Cassidy, J. T., Duran, B. S., Fink, C. W., Jacobs, J. D., Markowitz, M., Reynollds, W. E., Schaller, J., Stillman, J. S., and Wallace, S. L. (1973). Bulletin on Rheumatic Diseases, 23, 712.
4. Buc, M., Nyulassy, S., Stefanovic, J., Michalko, J., and Mozolova, D. (1974). Tissue Antigens, 4, 395.
5. Chylack, L. T., Bien Fang, D. C., Bellow, A. R., Stillman, J. S. (1975). American Journal of Ophthalmology, 79, 1026.