@misc{indiciae56ef0ae490c5,
  title = {How to avoid system obsolescence.},
  author = {R L Simpson},
  year = {1991},
  doi = {10.1097/00006247-199107000-00009},
  url = {https://pubmed.ncbi.nlm.nih.gov/1852360/},
  note = {Source identifier: 1852360}
}