1. Baranov, A.I., Shuvalov, L.A., and Shchagina, N.M., Pis’ma Zh. Eksp. Teor. Fiz., 1982, vol. 36, p. 381.
2. Colomban, Ph. and Novak, A., Proton Conductors: Solids, Membranes, and Gels—Materials and Devices, Ed. Colomban, Ph., Cambridge: Cambridge University Press, 1992, p. 38.
3. Baranov, A.I., Sinitsyn, V.V., Vinnichenko, V.Yu., Jones, D.J., and Bonnet, B., Solid State Ionics, 1997, vol. 97, p. 153.
4. Baranov, A.I., Kniznichenko, V.P., and Shuvalov, L.A., Ferroelectrics, 1989, vol. 100, p. 135.
5. Sinitsyn, V.V., Ponyatovskii, E.G., Baranov, A.I., Tregubchenko, A.V., and Shuvalov, L.A., Zh. Eksp. Teor. Fiz., 1991, vol. 100, p. 693.