@misc{indiciaeec7243eb031d,
  title = {Embedding trees in the rationals.},
  author = {J Baumgartner and J Malitz and W Reinhardt},
  year = {1970},
  doi = {10.1073/pnas.67.4.1748},
  url = {https://pubmed.ncbi.nlm.nih.gov/16591891/},
  note = {Source identifier: 16591891}
}