1. Smith, R. H. (1967) Coal Res., CSIRO, no. 32, 9
2. Contributions (1964) Chemical Reactions in the Atmosphere (Faraday Discussions, Vol. 37), Chemical Society, London
3. Crutzen, P. (1974) Can. J. Chem., 52, 1569
4. Nicolet, M. (1974) Can. J. Chem., 52, 1381
5. Weinstock, B. (1969) Science, 166, 224