@misc{indiciae28150599adef,
  title = {Lessons learned from the Hubble Space Telescope planning and scheduling system implementation and operation},
  author = {Ruitberg, Edward O. and Ondrus, Paul J.},
  year = {1990},
  url = {https://ntrs.nasa.gov/citations/19910030340},
  note = {Source identifier: 19910030340}
}