@book { SachbezgeimLohnsteuerrecht,
    title = "Sachbezüge im Lohnsteuerrecht",
    author = "Bert {Kimpel}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1106543"
}