Luminescence in Ce3+ doped mixed sulphate fluoride phosphors [ NaMgSO4F and Na3SO4F]S. C. Gedam, S. J. Dhoble and S. V. MoharilEur. Phys. J. Appl. Phys., 37 1 (2007) 73-78DOI: https://doi.org/10.1051/epjap:2006132