@misc{indiciaef45f567a6307,
  title = {Imaging performance of annular apertures. III - Apodization and modulation transfer functions},
  author = {Tschunko, H. F. A.},
  year = {1979},
  url = {https://ntrs.nasa.gov/citations/19800028970},
  note = {Source identifier: 19800028970}
}