@misc{indiciae0375d2fdb9ff,
  title = {Permutable Periodic Transformations.},
  author = {P A Smith},
  year = {1944},
  doi = {10.1073/pnas.30.5.105},
  url = {https://pubmed.ncbi.nlm.nih.gov/16578119/},
  note = {Source identifier: 16578119}
}