@misc{indiciaecc42b5801203,
  title = {Mission Design for the Deep Space 4/Champollion Comet Sample Return Mission},
  author = {Sims, J. A. and Tan-Wang, G. H.},
  year = {1998},
  url = {https://ntrs.nasa.gov/citations/20210005619},
  note = {Source identifier: 20210005619}
}