Ion transport and diffusion in nanocrystalline and glassy ceramics - Impedance and NMR spectroscopy measurements on Li ion conductorsP. Heitjans, E. Tobschall and M. WilkeningEur. Phys. J. Special Topics, 161 (2008) 97-108DOI: https://doi.org/10.1140/epjst/e2008-00753-4