@book { DerKronzeugeimKartellrecht,
    title = "Der Kronzeuge im Kartellrecht ",
    author = "Lars {Maritzen}",
    year = "2013",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783656428541",
    url = "https://www.hausarbeiten.de/document/214911"
}