@misc{indiciae33a440afe738,
  title = {Phase error statistics of a phase-locked loop synchronized direct detection optical PPM communication system},
  author = {Natarajan, Suresh and Gardner, C. S.},
  year = {1987},
  url = {https://ntrs.nasa.gov/citations/19870015167},
  note = {Source identifier: 19870015167}
}