@misc{indiciaeec6806a4446f,
  title = {Variable Refractive Index Effects on Radiation in Semitransparent Scattering Multilayered Regions},
  author = {Siegel, R. and Spuckler, C. M.},
  year = {1993},
  url = {https://ntrs.nasa.gov/citations/19930070466},
  note = {Source identifier: 19930070466}
}