@misc{indiciae9c7ecf0c1248,
  title = {A ranking algorithm for spacelab crew and experiment scheduling},
  author = {Grone, R. D. and Mathis, F. H.},
  year = {1980},
  url = {https://ntrs.nasa.gov/citations/19810003478},
  note = {Source identifier: 19810003478}
}