@misc{indiciae2a5eda18454f,
  title = {Factors affecting x-ray spectra.},
  author = {E L Nickoloff and H L Berman},
  year = {1993},
  doi = {10.1148/radiographics.13.6.8290728},
  url = {https://pubmed.ncbi.nlm.nih.gov/8290728/},
  note = {Source identifier: 8290728}
}