@misc{indiciaec45be8c1bf8b,
  title = {Tracking a phase-shift-keyed signal},
  author = {Villarreal, S. and Lenett, S. D. and Kobayashi, H. S. and Pawlowski, J. F.},
  year = {1977},
  url = {https://ntrs.nasa.gov/citations/19760000481},
  note = {Source identifier: 19760000481}
}