@misc{indiciaea5b8d3fa3b19,
  title = {Universal, computer facilitated, steady state oscillator, closed loop analysis theory and some applications to precision oscillators},
  author = {Benjamin Parzen},
  year = {1991},
  url = {https://ntrs.nasa.gov/citations/19920024122},
  note = {Source identifier: 19920024122}
}