1. Global data on blindness;Thylefors;Bull World Health Organ,1995
2. Childhood blindness in the context of VISION 2020 – the right to sight;Gilbert;Bull World Health Organ,2001
3. Handbook of nutrition and ophthalmology;Semba,2006
4. Xerophthalmia, keratomalacia and xerosis conjunctivae;Blegvad;Am J Ophthalmol,1924
5. Blindness and other diseases in children arising from deficient nutrition (lack of fat–soluble A factor);Bloch;Am J Dis Child,1924