@book { DueDiligencebeiPakettransaktionen,
    title = "Due Diligence bei Pakettransaktionen",
    author = "Wolf {Bussian}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1105336"
}