@inproceedings{xiao-etal-2007-empirical,
    title = "An Empirical Study of Non-Stationary Ngram Model and its Smoothing Techniques",
    author = "Xiao, Jinghui  and
      Liu, Bingquan  and
      Wang, Xiaolong",
    booktitle = "International Journal of Computational Linguistics {\&} {C}hinese Language Processing, Volume 12, Number 2, June 2007",
    month = jun,
    year = "2007",
    url = "https://preview.aclanthology.org/fix-sig-urls/O07-4002/",
    pages = "127--154"
}