1. Vohra, K.G. (1975) IAEA-SM-197/3, 209
2. Janssens, A. et al. (1982) Physicalia Magazine 4, 86 (in Dutch)
3. Metayer, Y. et al. (1980) J. Aerosol Sci. 12, 198
4. Raes, F. et al. (1983) J. Aerosol Sci. 14, 302
5. Kiang, C.S. et al. (1973) Faraday Symp. Chem. Soc. 7, 26