@misc{indiciaec3db1db8e983,
  title = {Charging effects in the cometary environment of Halley},
  author = {Thiemann, H. and Grard, R. and Singh, N. and Schunk, R. W.},
  year = {1985},
  url = {https://ntrs.nasa.gov/citations/19870029006},
  note = {Source identifier: 19870029006}
}