@misc{indiciae18e59bafaa9e,
  title = {Micrometeoroid and Orbital Debris Environment and Hypervelocity Shields},
  author = {Christiansen, Eric and Lear, Dana},
  year = {2012},
  url = {https://ntrs.nasa.gov/citations/20120002584},
  note = {Source identifier: 20120002584}
}