@book { DirektzusagenimSteuerrechtderPersonengesellschaften,
    title = "Direktzusagen im Steuerrecht der Personengesellschaften",
    author = "Jörg {Luckey}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1094241"
}