@book { InkompatibilittundKumulationsverbot,
    title = "Inkompatibilität und Kumulationsverbot",
    author = "Jürgen {Cleve}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1088017"
}