@misc{indiciae4bfaf0504ceb,
  title = {Modifications of comet materials by the sublimation process: Results from simulation experiments},
  author = {Gruen, E. and Bar-Nun, Akiva and Lammerzahl, P. and Klinger, J. and Kochan, H. and Keller, H. U. and Neukum, G. and Roessler, K. and Stoeffler, D. and Spohn, T.},
  year = {1989},
  url = {https://ntrs.nasa.gov/citations/19900007305},
  note = {Source identifier: 19900007305}
}