1. CTFA cosmetic ingredient handbook,1988
2. Cosmetics in dermatology;Draelos,1990
3. Efficacy of tan accelerators;Jaworsky;J Am Acad Dermatol,1987
4. Psoralen-containing sunscreen induces phototoxicity and epidermal ornithine decarboxylase activity;Walter;J Am Acad Dermatol,1982
5. Psoralen-containing sunscreen is tumorigenic in hairless mice;Cartwright;J Am Acad Dermatol,1983