@misc{indiciae983405e2b6c9,
  title = {Quantum Langevin equations for a two-mode parametric amplifier: Noise squeezing without negative diffusion.},
  author = {Sainz de los Terreros L and FJ Bermejo},
  year = {1992},
  doi = {10.1103/physreva.45.1906},
  url = {https://pubmed.ncbi.nlm.nih.gov/9907178/},
  note = {Source identifier: 9907178}
}