@misc{indiciaec85fe08b91ee,
  title = {Monolithic nonplanar ring lasers - Resistance to optical feedback},
  author = {Nilsson, Alan C. and Byer, Robert L. and Kane, Thomas J.},
  year = {1988},
  url = {https://ntrs.nasa.gov/citations/19890044958},
  note = {Source identifier: 19890044958}
}