@misc{indiciae4a3e32bdef9c,
  title = {Limits on the Gravitational Wave Background from Spacecraft Doppler Experiments},
  author = {Giampieri, G. and Vecchio, A.},
  year = {1994},
  url = {https://ntrs.nasa.gov/citations/20060042228},
  note = {Source identifier: 20060042228}
}