1. Habasaki, J., Leon, C., Ngai, K.L.: Dynamics of Glassy, Crystalline and Liquid Ionic Conductors. Springer, Cham (2016)
2. Hodge, I.M., Ngai, K.L., Moynihan, C.T.: J. Non-Cryst. Solids. 351, 104 (2005)
3. Richert, R., Wagner, H.: Solid State Ionics. 105, 167 (1998)
4. Chantry, G.W.: Long-wave Optics. Academic, London (1984)
5. Hill, N.F., Vaughan, W.E., Price, A.H., Davies, M.: Dielectric Properties and Molecular Behavior, p. 112. Van Nostrand, London (1969)