@misc{indiciae80db1082f8a4,
  title = {Extensions of Partially Ordered Sets.},
  author = {H M Macneille},
  year = {1936},
  doi = {10.1073/pnas.22.1.45},
  url = {https://pubmed.ncbi.nlm.nih.gov/16588044/},
  note = {Source identifier: 16588044}
}