@misc{indiciae020b6ce303ca,
  title = {Barrier/n/n+ Varactor Frequency Multipliers},
  author = {Lieneweg, Udo and Tolmunen, Timo J. and Frerking, Margaret A. and Maserjian, Joseph},
  year = {1992},
  url = {https://ntrs.nasa.gov/citations/19920000446},
  note = {Source identifier: 19920000446}
}