@article{145576, author = {John Burnett and Zachary Levine and Eric Shirley and J Bruning}, title = {Symmetry of Intrinsic Birefringence of CaF2 and Its Implications for CaF2 UV Optics}, year = {2002}, number = {1}, month = {2002-01-01}, publisher = {Journal of Microlithography Microfabrication and Microsystems}, language = {en}, }