@phdthesis{
    Laaksonen1997,
    author = "Laaksonen, Jorma",
    school = "Helsinki University of Technology, Laboratory of Computer in Information Science",
    title = "Subspace Classifiers in Recognition of Handwritten Digits",
    url = "http://lib.tkk.fi/Diss/199X/isbn9512254794/",
    series = "Acta Polytechnica Scandinavica. Mathematics and Computing Series No. 84",
    year = "1997",
    flags = "",
    address = "Espoo, Finland",
    owner = "MM",
    impactfactor = "G5"
}