@article{Kelly1956,
  author = {Kelly, J. L.},
  title = {A New Interpretation of Information Rate},
  journal = {The Bell System Technical Journal},
  year = {1956},
  volume = {35},
  number = {4},
  pages = {917--926},
  doi = {10.1002/j.1538-7305.1956.tb03809.x}
}