@article{article7b2390b7,
title   = {Electric conductivity and relaxation in fluoride, fluorophosphate and phosphate glasses: analysis by impedance spectrocopy},
author = {Lanfredi, Silvania and Saia, P S and Lebullenger, Ronan and Hernandes, Antônio Carlos},
year = {2002},
doi = {10.1016/s0167-2738(01)01030-x},
journal   = {Solid State Ionics}
}