Using pressure, temperature and frequency as variables to study the dynamics of mobile ions in materials with disordered structuresK. Funke, R. D. Banhatti, D. Laughman, M. Mutke and M. D. IngramEur. Phys. J. Special Topics, 161 (2008) 65-78DOI: https://doi.org/10.1140/epjst/e2008-00751-6