1. Federal Register 43:166. Proposed rule: sunscreen drug products for over‐the‐counter human use. Notice of Proposed Rule Making. p.38268. 1978.
2. Federal Register 64:98. Sunscreen drug products for over‐the‐counter human use: final rule. P. 27688 1999.
3. Federal Register 72:165. Sunscreen drug products for over‐the‐counter human use: proposed amendment to final monograph; proposed rule. P.49113. 2007.
4. Mechanisms of sunscreen failure
5. Federal Register 76:117. Sunscreen drug products for over‐the‐counter human use; final rules and proposed rules. p.35662. 2011.