@misc{indiciaedb4458566f81,
  title = {Electromagnetic Scattering from Arbitrarily Shaped Aperture Backed by Rectangular Cavity Recessed in Infinite Ground Plane},
  author = {Cockrell, C. R. and Beck, Fred B.},
  year = {1997},
  url = {https://ntrs.nasa.gov/citations/19970017399},
  note = {Source identifier: 19970017399}
}