@phdthesis{
    Hollmen99b,
    author = "Hollm\'en, Jaakko",
    school = "Helsinki University of Technology",
    language = "eng",
    responsibleperson = "Jaakko Hollm\'en",
    title = "Probabilistic Approaches to Fraud Detection",
    url = "http://www.cis.hut.fi/jhollmen/Publications/Hollmen99b.ps",
    optnote = "",
    month = "December",
    optannote = "",
    year = "1999",
    type = "Licentiate's Thesis"
}