@book { WiegestaltenwirVernderungen,
    title = "Wie gestalten wir Veränderungen?",
    author = "Horst {Zillessen} and Stefan {Kessen}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1103167"
}