@misc{indiciae29af446a0cb1,
  title = {Atomic clocks for astrophysical measurements},
  author = {Vessot, R. F. C. and Mattison, E. M.},
  year = {1982},
  url = {https://ntrs.nasa.gov/citations/19830046511},
  note = {Source identifier: 19830046511}
}