@article{177831,
  author = {John Burnett and Zachary Levine and Eric Shirley},
  title = {Intrinsic Birefringence in Calcium Fluoride and Barium Floride},
  year = {2001},
  number = {64},
  month = {2001-12-01},
  publisher = {Physical Review B},
  language = {en},
}