@book { EinFuzzyApproachimInformationRetrieval,
    title = "Ein Fuzzy Approach im Information Retrieval",
    author = "Lucian {Rehm}",
    year = "2001",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    url = "https://m.diplom.de/document/220426"
}