@misc{indiciaeec5b459e6753,
  title = {Optimization of proton and heavy ion therapy using an adaptive inversion algorithm.},
  author = {A Brahme and P Källman and B K Lind},
  year = {1989},
  doi = {10.1016/0167-8140(89)90132-1},
  url = {https://pubmed.ncbi.nlm.nih.gov/2548234/},
  note = {Source identifier: 2548234}
}