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Aust, W. Stahl, H. Sies, H. Tronnier, U. Heinrich (2005). "Supplementation with tomato-based products increases lycopene, phytofluene, and phytoene levels in human serum and protects against UV-light-induced erythema". Int J Vitam Nutr Res75 (1): 54–60. PMID15830922. doi:10.1024/0300-9831.75.1.54.
B. B. Fuller; D. R. Smith; A. J. Howerton; D. Kern (2006). "Anti-inflammatory effects of CoQ10 and colorless carotenoids". Journal of Cosmetic Dermatology5 (1): 30–38. PMID17173569. doi:10.1111/j.1473-2165.2006.00220.x.