@misc{indiciae197b2b894e64,
  title = {Four-mode squeezing},
  author = {Schumaker, B. L. and Perlmutter, S. H. and Shelby, R. M. and Levenson, M. D.},
  year = {1987},
  url = {https://ntrs.nasa.gov/citations/19870042722},
  note = {Source identifier: 19870042722}
}