@book{ BA5948520X, author = "Paolillo, John C. and Stanford University. Center for the Study of Language and Information", title = "Analyzing linguistic variation : statistical models and methods", publisher = "Center for the Study of Language and Information", year = "2002", series = "CSLI lecture notes", number = "no. 114", URL = "https://ci.nii.ac.jp/ncid/BA5948520X" }