1. Sunscreens, photocarcinogenesis, melanogenesis and psoralens;Brit. med. J.,1981
2. Keratoses and nonmelanoma skin tumours in long-term photochemotherapy (PUVA);Hönigsmann;J. Amer. Acad. Dermatol.,1980
3. Skin cancer in the PUVA-48 cooperative study;Roenigk;J. Amer. Acad. Dermatol.,1981
4. PUVA treatment and skin cancer: a follow-up study;Lassus;Acta derm.-venereol.,1981
5. Methoxsalen photochemotherapy;Strauss;Lancet,1980