1. M.J. Molina and F.S. Rowland, Nature 249 (1974) 810.
2. L.E. Manzer and V.N.M. Rao, Adv. Catal. 39 (1993) 329.
3. G.A. Webb and J.M. Winfield, Chem. Brit. (1992) 996.
4. B. Coq, J.M. Cognion, F. Figueras and D. Tournigant, J. Catal. 141 (1993) 21.
5. S. Morikawa, M. Yoshitake and S. Tatematsu, Japan Kokai Tokyo Koho, Jpn. Patent 319442 (1989), assigned to Asahi Glass Co., Ltd.