1. Proc. I Int. Photobiol. Congress. Amsterdam;P Alexander,1954
2. Bungeler, W. Uber den Einflus Photosensibilisierender Substanzen auf die Enstehlung von Hautgeschwulsten. Z. Krebsforschung, 46, 130–167, 1937.
3. Calcutt, G. The photosensitizing action of chemical carcinogens. Br. J. Cancer, 8, 177–180, 1954.
4. Clark, J.H. The effect of long-wave ultraviolet radiation on the development of tumours induced by 20-methyl-cholanthrene. Cancer Res. 24, 207–211, 1964.
5. Dansi, A., Garzia, A., and Malinverni, O. Gli idrocarburi policiclici come catalizzatori di ossidazione. Ann. di Chim., 47, 110–117, 1957.