@misc{indiciae1c9c97223e5e,
  title = {Blocked exchanges revisited.},
  author = {T R Machan},
  year = {1997},
  doi = {10.1111/1468-5930.00061},
  url = {https://pubmed.ncbi.nlm.nih.gov/12474848/},
  note = {Source identifier: 12474848}
}