1. (a) in (Hrsg.): Water Science Reviews, An Annual Journal, Vol. 2, Cambridge University Press, Cambridge 1986;
2. (c) in , (Hrsg.): The Hydrogen Bond, Vol. II, North Holland, Amsterdam 1976, S. 471.
3. , : Superacids, Wiley-Interscience, New York 1985, S. 48.
4. Ionic species in hydrofluoric acid-antimony pentafluoride solutions. An infrared spectroscopy investigation