@misc{indiciae303a91307d05,
  title = {Central spinal stenosis. Classification and pathogenesis.},
  author = {R W Porter},
  year = {1993},
  doi = {10.3109/17453679309160121},
  url = {https://pubmed.ncbi.nlm.nih.gov/8451990/},
  note = {Source identifier: 8451990}
}