@TECHREPORT\{IMM2005-03444,
    author       = "K. B. Petersen and O. Winther",
    title        = "Explaining slow convergence of {EM} in low noise linear mixtures",
    year         = "2005",
    number       = "",
    series       = "IMM-Technical report-2005-02",
    institution  = "Informatics and Mathematical Modelling, Technical University of Denmark, {DTU}",
    address      = "Richard Petersens Plads, Building 321, {DK-}2800 Kgs. Lyngby",
    type         = "",
    url          = "http://www2.compute.dtu.dk/pubdb/pubs/3444-full.html",
    abstract     = "This report conducts an investigation of the convergence properties of the {EM} algorithm used for linear mixture models. Since the linear mixture model is a rather general approach, the analysis is relevant for a wide range of models which to some degree are subsets of each other: Independent Component Analysis (ICA), probabilistic {PCA,} Factor Analysis (FA), Independent Factor Analysis (IFA) and Mean Field {ICA}."
}