Percolative conductivity in alkaline-earth silicate melts and glasses M. Malki, M. Micoulaut, F. Chaimbault, Y. Vaills and P. Simon Europhys. Lett., 64 5 (2003) 661-667 Published online: 01 November 2003 DOI: 10.1209/epl/i2003-00278-2