@misc{indiciae39c77ca3d90a,
  title = {Are the circular, dark features on Comet Borrelly's surface albedo variations or pits?},
  author = {R.M. Nelson and L.A. Soderblom and B.W. Hapke},
  year = {2004},
  doi = {10.1016/j.icarus.2003.04.002},
  url = {https://pubs.usgs.gov/publication/70027782},
  note = {Source identifier: 70027782}
}