@incollection{
    Honkela98klass,
    editor = "Balderjahn, I. and Mathar, R. and Schader, M.",
    author = "Honkela, Timo and Kaski, Samuel and Kohonen, Teuvo and Lagus, Krista",
    publisher = "Springer",
    title = "Self-Organizing Maps of Very Large Document Collections: Justification for the {WEBSOM} method",
    booktitle = "Classification, Data Analysis, and Data Highways",
    address = "Berlin",
    year = "1998",
    pages = "245-252"
}