Reference:

Krista Lagus and Samuel Kaski. Keyword selection method for characterizing text document maps. In Proceedings of ICANN99, Ninth International Conference on Artificial Neural Networks, volume 1, pages 371–376. IEE, London, 1999.

Suggested BibTeX entry:

@incollection{Lagus99icann,
    author = {Krista Lagus and Samuel Kaski},
    booktitle = {Proceedings of ICANN99, Ninth International Conference on Artificial Neural Networks},
    pages = {371--376},
    publisher = {IEE, London},
    title = {Keyword selection method for characterizing text document maps},
    volume = {1},
    year = {1999},
}