@misc{indiciaea116175e1efd,
  title = {Second generation Mars landed missions},
  author = {Graf, J. and Rivellini, T. and Sabahi, D. and Thurman, S. and Eisen, H.},
  year = {2000},
  url = {https://ntrs.nasa.gov/citations/20060040503},
  note = {Source identifier: 20060040503}
}