@misc{indiciae3a640dd95e34,
  title = {Annular aperture diffracted energy distribution for an extended source},
  author = {Goldberg, I. L. and Mc Culloch, A. W.},
  year = {1968},
  url = {https://ntrs.nasa.gov/citations/19680013447},
  note = {Source identifier: 19680013447}
}