1. Brosset, C.: (1987), Water, Air and Soil Pollution, 43,147.
2. Durrant, Ph.J. and Durrant, B., 1962, 472 in Ph.J. Durrant and B. Durrant, Introduction to Advanced Inorganic Chemistry, Longmans, Green and Co. Ltd.
3. Iverfeldt, Å. and Lindqvist, O.: (1986), Atmos. Environ. 20, 1567.
4. Martell, A.E. and Smith, R.M.: (eds), Critical Stability Constants, Plenum Press, New York and London.
5. Schroeder, W.H., Yarwood, G. and Niki, H.: (1990), Paper presented at the International Conference on Mercury as an Environmental Pollutant, Gävle, Sweden. June 11–13, 1990.