@misc{indiciae7afab2e18f17,
  title = {Spatial frequency filtering and target identification.},
  author = {J Norman and S Ehrlich},
  year = {1987},
  doi = {10.1016/0042-6989(87)90145-3},
  url = {https://pubmed.ncbi.nlm.nih.gov/3617549/},
  note = {Source identifier: 3617549}
}