1. Robinson, R.A., Stokes, R.H.: Electrolyte Solutions. Butterworths, London (1959)
2. Samoylov, O.Ya.: Structure of Aqueous Electrolyte Solutions and Hydration of Ions. Consultants Bureau, New York (1965)
3. Techniques of Electrochemistry;D.F. Evans,1973
4. Grilikhes, M.S., Filanovskii, B.K.: Contact Conductometry. Khimiya, Leningrad (1980) (in Russian)
5. Blumenthal, G., Engels, S., Fitz, I., Haberditzl, W., Heckner, K.-H., Henrion, G., Landsbeger, R., Schmidt, W., Scholz, G., Starke, P., Wilke, I., Wilke, K.-Th.: In: Kolditz, L. (ed.) Anorganikum, vol. 2. VEB Deutscher Verlag der Wissenschaften, Berlin (1984)