@misc{indiciae95d523d3d846,
  title = {The Great Wall and beyond.},
  author = {A O'Brien},
  year = {1987},
  doi = {10.1038/sj.bdj.4806272},
  url = {https://pubmed.ncbi.nlm.nih.gov/3479142/},
  note = {Source identifier: 3479142}
}