@book { ZeichenundStil,
    title = "Zeichen und Stil",
    author = "Georg {Albert} and Joachim {Franz}",
    year = "2013",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-02959-8",
    url = "https://www.peterlang.com/document/1047770"
}