@misc{indiciae268520aa5b17,
  title = {Differentiation circuits for amplitude modulated signal envelopes},
  author = {Anisimov, V. I. and Likhodiyevskiy, Yu. F.},
  year = {1966},
  url = {https://ntrs.nasa.gov/citations/19670009131},
  note = {Source identifier: 19670009131}
}