@misc{indiciae6485b8022a7f,
  title = {The head-scatter factor for small field sizes.},
  author = {T C Zhu and B E Bjärngard},
  year = {1994},
  doi = {10.1118/1.597256},
  url = {https://pubmed.ncbi.nlm.nih.gov/8164590/},
  note = {Source identifier: 8164590}
}