@misc{indiciae1b065a868e42,
  title = {Effective focal spot size.},
  author = {J J Bookstein and W Steck},
  year = {1971},
  doi = {10.1148/98.1.31},
  url = {https://pubmed.ncbi.nlm.nih.gov/5541429/},
  note = {Source identifier: 5541429}
}