1. The increasing frequency of diabetic retinopathy;Vogelius;Acta Ophth.,1949
2. Ueber diabetische Netzhautentzündung
3. Textbook of Ophthalmology;Duke-Elder,1941
4. The Doyne Memorial Lecture. Pathological changes in the retinal blood-vessels in arterio-sclerosis and hypertension;Friedenwald;Tr. Ophth. Soc. U. Kingdom,1930
5. The Pathology of Diabetes Mellitus;Warren,1938