@misc{indiciae0d20df7697ba,
  title = {A planning language for activity scheduling},
  author = {Zoch, David R. and Lavallee, David and Weinstein, Stuart and Tong, G. Michael},
  year = {1991},
  url = {https://ntrs.nasa.gov/citations/19920001845},
  note = {Source identifier: 19920001845}
}