@misc{indiciae8495ffe27595,
  title = {A non-linear programming method for optimizing parallel-hole collimator design.},
  author = {G H Simmons and J M Christenson and J G Kereiakes and G K Bahr},
  year = {1975},
  doi = {10.1088/0031-9155/20/5/007},
  url = {https://pubmed.ncbi.nlm.nih.gov/1187778/},
  note = {Source identifier: 1187778}
}