1. E. A. Guggenheim, Mixtures, Oxford University Press, Oxford, 1952.
2. J. Maier, Solid state electrochemistry I: Thermodynamics and kinetics of charge carriers in solids. in: Modern Aspects of Electrochemistry Vol. 38, Ed. by B. E. Conway, C. G. Vayenas, R. E. White, and M. E. Gamboa-Adelco Kluwer Academic/Plenum Pubishers, New York, 2005, pp. 1-173.
3. J. Maier, Z. Phys. Chem. N.F. 140 (1984) 191.
4. ∂ / ∂a symbolically stands for the vector with the components (∂/∂ ax , ∂ /∂ay , ∂ /∂ az ) = ▽a
5. L. D. Landau and E. M. Lifshitz, Electrodynamics of Continuous Media (Course of Theoretical Physics) Vol. 8, Pergamon Press, Oxford, 1963.