@misc{indiciae47d892430fcc,
  title = {Optimizing Spacecraft Placement for Liaison Constellations},
  author = {Chow, C. Channing and Villac, Benjamin F. and Lo, Martin W.},
  year = {2011},
  url = {https://ntrs.nasa.gov/citations/20120004224},
  note = {Source identifier: 20120004224}
}