@article{95011, author = {Ulf Griesmann and J Burnett and R Gupta}, title = {Absolute Refractive Indices and Thermal Coefficients of CaF2, SrF2, BaF2, and LiF Near 157 nm}, year = {2002}, month = {2002-05-01}, publisher = {Applied Optics}, language = {en}, }