@misc{indiciae4b2d3c76a678,
  title = {On relations between sets. II.},
  author = {N Rashevsky},
  year = {1966},
  doi = {10.1007/bf02476395},
  url = {https://pubmed.ncbi.nlm.nih.gov/5956172/},
  note = {Source identifier: 5956172}
}