@misc{indiciae62d134beed1b,
  title = {Groups Containing Less Than Twenty-Eight Non-Invariant Operators.},
  author = {G A Miller},
  year = {1944},
  doi = {10.1073/pnas.30.9.275},
  url = {https://pubmed.ncbi.nlm.nih.gov/16588658/},
  note = {Source identifier: 16588658}
}