@misc{indiciaeb71e2792cd44,
  title = {Whispering gallery mode narrowband tunable photonic filter},
  author = {Aavchenkov, A. and Iltchenko, V. S. and Matsko, A. and Maleki, L.},
  year = {2003},
  url = {https://ntrs.nasa.gov/citations/20060040039},
  note = {Source identifier: 20060040039}
}