@misc{indiciaefc6873fbe655,
  title = {Frequency analysis with a programmable calculator.},
  author = {S A Yakush},
  year = {1980},
  doi = {10.1016/0010-4825(80)90020-7},
  url = {https://pubmed.ncbi.nlm.nih.gov/7408453/},
  note = {Source identifier: 7408453}
}