@misc{indiciaeb91bf4ce9298,
  title = {POLYADIC BOOLEAN ALGEBRAS.},
  author = {P R Halmos},
  year = {1954},
  doi = {10.1073/pnas.40.5.296},
  url = {https://pubmed.ncbi.nlm.nih.gov/16589476/},
  note = {Source identifier: 16589476}
}