1. Wubbels, G. Accts. Chem. Res. 1983, 16, 285.
2. Albini, A. J. Chem. Ed. 1986, 63, 383.
3. Braslavsky, S.E.; Houk, K.N. Eur. Photochem. Assoc. Newsletter 1985, 25, 13; 1986,26, 15; 1986 27, 3 (CA 105: 105612)
4. Carassiti, V. Eur. Photochem. Assoc. Newsletter 1984, 21, 12.
5. Kisch, H.; Hennig, H. Eur. Photochem. Assoc. Newsletter 1983, 19, 23.