1. Biological actions of carotenoids;Bendich;FASEB J,1989
2. Recommended Dietary Allowances;Food and Nutrition Board,1989
3. The vitamin A activity of beta-carotene;Brubacher;Int J Vitam Nutr Res,1984
4. Vitamin A in animal and human nutrition;Underwood,1984
5. Retinol-binding protein: the serum transport protein for vitamin A;Blaner;Endocr Rev,1989