@book { FeirefizDasSchriftstckGottes,
    title = "Feirefiz – Das Schriftstück Gottes",
    author = "Nicole {Müller}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1105818"
}