@misc{indiciae5490a3b75dee,
  title = {Secondary Impacts on Structures on the Lunar Surface},
  author = {Christiansen, Eric and Walker, James D. and Grosch, Donald J.},
  year = {2010},
  url = {https://ntrs.nasa.gov/citations/20090032039},
  note = {Source identifier: 20090032039}
}