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J. J. Kamm: Toxicology, carcinogenicity, and teratogenicity of some orally administered retinoids. In: Journal of the American Academy of Dermatology. Band 6, Nummer 4 Pt 2 Suppl, April 1982, S. 652–659, doi:10.1016/s0190-9622(82)70054-4, PMID 7040511 (Review).
SQ. Wang, SW. Dusza, HW. Lim: Safety of retinyl palmitate in sunscreens: a critical analysis. In: Journal of the American Academy of Dermatology. Band63, Nr.5, 2010, S.903–6, doi:10.1016/j.jaad.2010.07.015, PMID 20692724.