@misc{indiciae07b45ede0928,
  title = {Improvements in deep-space tracking by use of third-order loops.},
  author = {Tausworth, R. C. and Crow, R. B.},
  year = {1972},
  url = {https://ntrs.nasa.gov/citations/19730038604},
  note = {Source identifier: 19730038604}
}