Number | Date | Country | Kind |
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197 50 528 | Nov 1997 | DEX |
Number | Date | Country |
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0 313 304 | Apr 1989 | EPX |
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D. Darr, et al., British Journal of Dermatology, vol. 127, pp. 247-253, "Topical Vitamin C Protects Porcine Skin From Ultraviolet Radiation-Induced Damage", 1992. |
B.M. Tolbert, et al., Annals of the New York Academy of Sciences, vol. 258, pp. 48-69, "Chemistry and Metabolism of Ascorbic and Ascorbate Acid Sulfate", Sep. 30, 1975. |