Ye i cols. 2000. Engineering the provitamin A (beta-carotene) biosynthetic pathway into (carotenoid-free) rice endosperm. Science 287 (5451): 303-305 PMID: 10634784
Humphrey, J.H., West, K.P. Jr, and Sommer, A. 1992. Vitamin A deficiency and attributable mortality in under-5-year-olds. WHO BulletinArxivat 2011-05-14 a Wayback Machine. 70: 225-232
International Rice Research Institute. 2005. Program 3Arxivat 2006-07-21 a Wayback Machine., Annual Report of the Director General 2004-05
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Humphrey, J.H., West, K.P. Jr, and Sommer, A. 1992. Vitamin A deficiency and attributable mortality in under-5-year-olds. WHO BulletinArxivat 2011-05-14 a Wayback Machine. 70: 225-232