@misc{indiciaed4b7ed85c367,
  title = {Differentiation circuits for amplitude- modulated signal envelopes},
  author = {Anisimov, V. I. and Likhodiyevskiy, Yu. F.},
  year = {1966},
  url = {https://ntrs.nasa.gov/citations/19670002901},
  note = {Source identifier: 19670002901}
}