@MISC\{IMM2008-05677,
    author       = "F. {\AA}. Nielsen",
    title        = "Clustering of scientific citations in Wikipedia (slides)",
    year         = "2008",
    month        = "jul",
    keywords     = "Wikipedia, non-negative matrix factorization, clustering, scientometrics, Wikimania, citation",
    publisher    = "Informatics and Mathematical Modelling, Technical University of Denmark",
    address      = "Richard Petersens Plads, Building 321, {DK-}2800 Kgs. Lyngby",
    url          = "http://www2.compute.dtu.dk/pubdb/pubs/5677-full.html",
    abstract     = "The instances of templates in Wikipedia form an interesting data set of structured information. Here I focus on the cite journal template that is primarily used for citation to articles in scientific journals. These citations can be extracted and analyzed: Non-negative matrix factorization is performed on a (article x journal) matrix resulting in a soft clustering of Wikipedia articles and scientific journals, each cluster more or less representing a scientific topic."
}