1. Vitrectomy for complications of diabetic retinopathy;Michels;Arch. Ophthalmol.,1978
2. Vitreous Surgery;Michels,1981
3. Proliferative diabetic retinopathy. Pathophysiology of extraretinal complications and principles of vitreous surgery;Michels;Retina,1981
4. Vitrectomy techniques in retinal reattachment surgery;Michels;Ophthalmology,1979
5. Vitrectomy;Machemer,1979