@book { aproposWahlkampf,
    title = "apropos Wahlkampf",
    author = "Gerhard {Göhler} and Cornelia {Schmalz-Jacobsen} and Christian {Walther}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1106885"
}