1. Structure: general features;Rodieck,1973
2. Topography of the layer of rods and cones in the human retina;Osterberg;Acta Ophthalmol,1935
3. Cone types and cone arrangements in the retina of some cyprinids;Engstrom;Acta Zool,1960
4. Human photoreceptor topography;Curcio;J Comp Neurol,1990