Reference:

Vesa Siivola, Teemu Hirsimäki, and Sami Virpioja. On growing and pruning Kneser-Ney smoothed n-gram models. IEEE Transactions on Audio, Speech and Language Processing, 15(5):1617–1624, July 2007.

Suggested BibTeX entry:

@article{siivola07ieee,
    author = {Vesa Siivola and Teemu Hirsim{\"{a}}ki and Sami Virpioja},
    journal = {IEEE Transactions on Audio, Speech and Language Processing},
    month = {July},
    number = {5},
    pages = {1617--1624},
    publisher = {IEEE},
    title = {On Growing and Pruning {K}neser-{N}ey Smoothed N-Gram Models},
    volume = {15},
    year = {2007},
}