@misc{indiciaec05f3efd6c43,
  title = {Projectile Density Effects on Shield Performance},
  author = {Christiansen, Eric L. and Lear, Dana and Lyons, Frankel and Davis, Alan},
  year = {2009},
  url = {https://ntrs.nasa.gov/citations/20090032052},
  note = {Source identifier: 20090032052}
}