@misc{indiciae96d2a93e1a41,
  title = {Systems approach to managing OR.},
  author = {B J Stevens},
  year = {1978},
  doi = {10.1016/s0001-2092(07)61032-1},
  url = {https://pubmed.ncbi.nlm.nih.gov/247951/},
  note = {Source identifier: 247951}
}