@article{brown-etal-1992-estimate,
    title = "An Estimate of an Upper Bound for the Entropy of {E}nglish",
    author = "Brown, Peter F.  and
      Della Pietra, Stephen A.  and
      Della Pietra, Vincent J.  and
      Lai, Jennifer C.  and
      Mercer, Robert L.",
    journal = "Computational Linguistics",
    volume = "18",
    number = "1",
    year = "1992",
    url = "https://preview.aclanthology.org/jlcl-multiple-ingestion/J92-1002/",
    pages = "31--40"
}