@book { AuenundInnen,
    title = "Außen und Innen",
    author = "Nikolaus {Staubach} and Vera {Johanterwage}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1103206"
}