@misc{indiciae49e88ec11c9e,
  title = {A pencil beam model for photon dose calculation.},
  author = {A Ahnesjö and M Saxner and A Trepp},
  doi = {10.1118/1.596856},
  url = {https://pubmed.ncbi.nlm.nih.gov/1584117/},
  note = {Source identifier: 1584117}
}