@misc{indiciaeb29651ef6d5e,
  title = {Temperature Tunable Air-Gap Etalon Filter},
  author = {Krainak, Michael A. and Stephen, Mark A. and Lunt, David L.},
  year = {1998},
  url = {https://ntrs.nasa.gov/citations/19990004150},
  note = {Source identifier: 19990004150}
}