1. The great protein fiasco;McLaren;Lancet,1974
2. Epidemiology and public health aspects of hypovitaminosis A: a global survey of xerophthalmia;Oomen;Trop Geogr Med,1964
3. Incidence, prevalence, and scale of blinding malnutrition;Sommer;Lancet,1981
4. Nutritional blindness: xerophthalmia and keratomalacia;Sommer,1982
5. Vitamin A deficiency: health, survival, and vision;Sommer,1996