@misc{indiciaed1a1e575ffd3,
  title = {High-frequency RCS of open cavities with rectangular and circular cross sections},
  author = {Ling, Hao and Lee, Shung-Wu and Chou, Ri-Chee},
  year = {1989},
  url = {https://ntrs.nasa.gov/citations/19890052224},
  note = {Source identifier: 19890052224}
}