@misc{indiciaeeeef49410af1,
  title = {Permeable Surface Corrections for Ffowcs Williams and Hawkings Integrals},
  author = {Lockard, David P. and Casper, Jay H.},
  year = {2005},
  url = {https://ntrs.nasa.gov/citations/20050182105},
  note = {Source identifier: 20050182105}
}