1. „Physikalische Chemie”, 3nd. ed., Vol. 1, Akademie Verlag, Berlin, 1986, p. 299.
2. „Thermodynamics of Solutions”, p. 10, in: „Activity Coefficients in Electrolyte Solutions„, (ed.), 2nd. ed., CRC Press Boca Raton Ann Arbor, Boston - London, 1991.
3. A. Ferse, unveröffentlicht.
4. „Handbook of Chemistry and Physics”, 85nd. ed., CRC Press, Boca Raton, London - New York - Washington, DC, 2004-2005.