@misc{indiciae7e959821bb51,
  title = {Access block: problems and progress.},
  author = {Peter A Cameron and Donald A Campbell},
  year = {2003},
  doi = {10.5694/j.1326-5377.2003.tb05091.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/12558472/},
  note = {Source identifier: 12558472}
}