@misc{indiciae1c42d53c14be,
  title = {Mercury's Na Exosphere from MESSENGER Data},
  author = {Killen, Rosemary M. and Burger, M. H. and Cassidy, T. A. and Sarantos, M. and Vervack, R. J. and McClintock, W. El and Merkel, A. W. and Sprague, A. L. and Solomon, S. C.},
  year = {2012},
  url = {https://ntrs.nasa.gov/citations/20120016310},
  note = {Source identifier: 20120016310}
}