Reference:

Mikaela Klami and Timo Honkela. Self-organized ordering of terms and documents in NSF awards data. In Proceedings of WSOM'07. University Library of Bielefeld, 2007.

Suggested BibTeX entry:

@inproceedings{KlamiHonkela07WSOM,
    author = {Mikaela Klami and Timo Honkela},
    booktitle = {Proceedings of WSOM'07},
    publisher = {University Library of Bielefeld},
    title = {Self-Organized Ordering of Terms and Documents in {NSF} Awards Data},
    year = {2007},
}