@misc{indiciaebfd7ad7202b2,
  title = {Models for Cometary Comae Containing Negative Ions},
  author = {Cordiner, M. A. and Charnley, S. B.},
  year = {2012},
  url = {https://ntrs.nasa.gov/citations/20120013151},
  note = {Source identifier: 20120013151}
}