@misc{indiciaef46f694b9a01,
  title = {Validation of Ray Tracing Code Refraction Effects},
  author = {Heath, Stephanie L. and McAninch, Gerry L. and Smith, Charles D. and Conner, David A.},
  year = {2008},
  url = {https://ntrs.nasa.gov/citations/20080018647},
  note = {Source identifier: 20080018647}
}