1. Shekelle R B, Lepper M, Liu S, Maliza C, Raymor W J, Rossof A H: Dietary vitamin A and risk of cancer in the Western Electric Study.The Lancet 1185–1190 (1981).
2. Santamaria L, Bianchi A, Arnaboldi A, Andreoni L: Prevention of the benzo(a)pyrene photocarcinogenic effect by beta-carotene and canthaxanthine. Preliminary study.Boll Chim Farm
119, 745–748 (1980).
3. Mathews-Roth M M: Carotenoid pigments as anti- tumor agents, in Nelson J D, Grassi C (eds):Current Chemotherapy and Infectious Disease, pp. 1503–1505. Washington, DC, The American Society for Microbiology (1980).
4. Seifter E, Rettura G, Stratford F, Levinson S M: CH3BA tumor prevention and treatment with beta-carotene.Fed Proc
40, 652–656 (1981).
5. Santamaria L, Bianchi A, Andreoni L, Santagati G, Arnaboldi A, Bermond P: 8-Methoxypsoralen photocarcinogenesis and its prevention by dietary carotenoids. Preliminary results.Med Biol Env
12, 533–537 (1984).