@misc{indiciae397e2c25e7f7,
  title = {Understanding Mercury's Exosphere: Models Derived from MESSENGER Observations: Chapter - 15},
  author = {Killen, Rosemary M. and Burger, Matthew H. and Vervack, Ronald J., Jr. and Cassidy, Timothy A.},
  year = {2018},
  url = {https://ntrs.nasa.gov/citations/20190025921},
  note = {Source identifier: 20190025921}
}