@book { DerArbeitgeberimLohnsteuerrecht,
    title = "Der Arbeitgeber im Lohnsteuerrecht",
    author = "Gerhard A. {Winter}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1086374"
}