@article{cooper-2005-mathematical,
    title = "A Mathematical Model of Historical Semantics and the Grouping of Word Meanings into Concepts",
    author = "Cooper, Martin C.",
    journal = "Computational Linguistics",
    volume = "31",
    number = "2",
    year = "2005",
    url = "https://preview.aclanthology.org/Add-Cong-Liu-Florida-Atlantic-University-author-id/J05-2004/",
    doi = "10.1162/0891201054223995",
    pages = "227--248"
}