1. Fundamentals of hematology;Rifkind,1980
2. Sickle cell retinopathy;Goldberg,1989
3. Behaviour of untreated proliferative sickle retinopathy;Condon;Br J Ophthalmol,1980
4. Conjunctival sign of sickle cell disease;Paton;Arch Ophthalmol,1961
5. The disc sign in sickling hemoglobinopathies;Goldbaum;Arch Ophthalmol,1978