1. Studies on carotenoid metabolism;Cheng;X. The site of conversion of carotene to vitamin A in the chick. J. Nutrition,1950
2. Studies on the conversion of β-carotene to vitamin A in vitro and in vivo;Matterson;Poultry Sci.,1950
3. Distribution of carotene and vitamin A in the tissues of chicks following administration of carotene;Olsen;Poultry Sci.,1959
4. Report on vitamin A in mixed feeds;Parrish;J. Assoc. Off. Agric. Chem.,1956
5. The conversion of β-carotene to vitamin A in the ligatured duodenum of the chick;Sibbald;Poultry Sci.,1959