@misc{indiciaebda990f04a2a,
  title = {Four photon parametric amplification},
  author = {Parrish, P. T. and Feldman, M. J. and Ohta, H. and Chiao, R. Y.},
  year = {1974},
  url = {https://ntrs.nasa.gov/citations/19740039065},
  note = {Source identifier: 19740039065}
}