@misc{indiciaeeb08c83a6fef,
  title = {Focal spot analogue.},
  author = {T J Hughes and E W Edmonds and W P Cockshott},
  year = {1972},
  doi = {10.1088/0031-9155/17/5/008},
  url = {https://pubmed.ncbi.nlm.nih.gov/4665842/},
  note = {Source identifier: 4665842}
}