@book { BilanzanalyseampraktischenBeispielderMetroAG,
    title = "Bilanzanalyse am praktischen Beispiel der Metro AG",
    author = "Michael {Bollow}",
    year = "2010",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783842805958",
    url = "https://m.diplom.de/document/228093"
}