1. Müller, K.-J. and Kreysa, G., Dechema-Monographien 98 (1985) 367.
2. Kammel, R. and Lieber, H.-W., Galvanotechnik 68 (1977) 413.
3. Kuhn, A.T., Chem. and Ind. (1971) 946.
4. Flett, D.S and Pearson, D., Chem. Ind. (1975) 639.
5. Kammel, R. and Lieber, H.-W., Galvanotechnik 68 (1977) 883.