1. Mahan, G.D., Roth, L.R. (eds.): Superionic Conductors. New York: Plenum Press 1976; Funke, K.: Prog. Solid State Chem.11, 345 (1976); van Gool, W.: Fast Ion Transport in Solids. Amsterdam: North-Holland 1973
2. Proceedings of International Conference on Lattice Dynamics, Paris 1977, Sept. 5?9
3. Burns, G., Dacol, F.H., Shafer, M.W.: Solid State Commun.19, 287 (1976)
4. Burns, G., Dacol, F.H., Shafer, M.W.: Solid State Commun.19, 291 (1976); Phys. Rev. B16, 1416 (1977)
5. Rice, M.J., Strässler, S., Toombs, G.A.: Phys. Rev. Lett.32, 596 (1974) Huberman, B.A.: Phys. Rev. Lett.32, 1000 (1974)