1. Textbook of the Fundus of the Eye;Ballantyne,1962
2. Clinical Neuro-Ophthalmology;Walsh,1957
3. Observations on the fundus oculi in diabetes mellitus;McKee;Canad. M. A. J.,1933
4. Diabetes mellitus as a cause of papillitis;Topilow;Am. J. Ophth.,1952