@misc{indiciae4612ae9d6fa0,
  title = {First evidence for 1-mm wavelength parametric amplification in a Josephson junction microwave source},
  author = {Ulrich, B. T. and Levinsen, M. T.},
  year = {1975},
  url = {https://ntrs.nasa.gov/citations/19750035293},
  note = {Source identifier: 19750035293}
}