@misc{indiciae8405229de3ad,
  title = {Optimized planning using physical objectives and constraints.},
  author = {T Bortfeld},
  year = {1999},
  doi = {10.1016/s1053-4296(99)80052-6},
  url = {https://pubmed.ncbi.nlm.nih.gov/10196396/},
  note = {Source identifier: 10196396}
}