1. Davis, M.D.,: A note on the O'Hare classification of diabetic retinopathy. In: Symposium on the treatment of diabetic retinopathy. (M.F. Goldberg, S.L. Fine, eds.), Public Health Service Publication No. 1890, pp. XXI?XXIV (1968)
2. Davis, M.D., Norton, E.W.D., Myers, F.L.: The Airlie classification of diabetic retinopathy. In: Symposium on the treatment of diabetic retinopathy.(M.F. Goldberg, S.L. Fine, eds.), Public Health Service Publication No. 1890, pp. 7?22 (1968)
3. Diabetic Retinopathy Study: Letter to Editor. Am. J. Ophthal. 76, 403 (1973)
4. Junge, J., Boon, K.L., Ottens, D.E.: Automatic information processing in diabetic retinopathy. Ophthalmologica (Basel) 171, 3?6 (1975)
5. Koerner, F., Schlegel, D., Koerner, U.: Diabetic retinopathy study. Preliminary results from 215 patients treated uniocularly with photocoagulation. Albrecht v. Graefe's Arch. klin. exp. Ophthal. 200, 99?111 (1976)