Reference. A mathematical theory of communication [shannon1948mathematical]

✍️source

@article{shannon1948mathematical,
  title = {A Mathematical Theory of Communication},
  author = {Shannon, Claude E.},
  journal = {Bell System Technical Journal},
  volume = {27},
  number = {3},
  pages = {379--423},
  year = {1948},
  doi = {10.1002/j.1538-7305.1948.tb01338.x},
  url = {https://doi.org/10.1002/j.1538-7305.1948.tb01338.x}
}