Reference:

Samuel Kaski. Self-organizing maps. In Claude Sammut and Geoffrey I. Webb, editors, Encyclopedia of Machine Learning, pages 886–888. Springer, Berlin, 2010.

Suggested BibTeX entry:

@incollection{Kaski10encyc,
    address = {Berlin},
    author = {Samuel Kaski},
    booktitle = {Encyclopedia of Machine Learning},
    editor = {Claude Sammut and Geoffrey I. Webb},
    pages = {886-888},
    publisher = {Springer},
    title = {Self-Organizing Maps},
    year = {2010},
}