@CONFERENCE\{IMM2006-04994,
    author       = "B. B{\"{o}}dvarsson and M. M{\o}rkebjerg and L. Hansen and G. M. Knudsen and C. Svarer",
    title        = "Extraction of time activity curves from positron emission tomography: {K-}means clustering or Non-negative matrix factorization",
    year         = "2006",
    month        = "jun",
    keywords     = "{NMF,} {K-}means clustering, positron emission tomography",
    pages        = "154",
    booktitle    = "Human Brain Mapping 2006 Florence",
    volume       = "31",
    series       = "",
    editor       = "NeuroImage",
    publisher    = "",
    organization = "",
    address      = "",
    url          = "http://www2.compute.dtu.dk/pubdb/pubs/4994-full.html",
    isbn_issn    = "1053-8119"
}