1. The effects of vitamin E and β-carotene on the incidence of lung cancer and other cancers in male smokers;ATBC Study group (The Alpha-Tocopherol, β-Carotene Cancer Prevention Study Group);N. Engl. J. Med.,1994
2. Carotenes and other vitamin A precursors in animal feed;Bauernfeind,1981
3. Buser, S., 1992. Determination of the Acute Oral Toxicity (Limited-test) of Beta-carotene (Ro-01-8300/000; Roche II synthesis ex Freeport) in the Rat. Roche, Internal Research Report No. B-161’158, as cited in SCF (2000a).
4. Buser, S., Hummler, H., 1982. The Effect of β-carotene (Ro 1-8300) on Reproductive Function of Multiple Generations in the Rat (Study Performed at Huntingdon Research Centre, England). Roche, Internal Research Report No. B-97’351, as cited in SCF (2000a).
5. Buser, S., Hummler, H., 1983a. The Effect of β-carotene in a Tumourigenicity Study in Mice (Dietary Administration during Life Time). Roche, Internal Research Report No. B-104’775, as cited in SCF (2000a).