@book { KooperationinderSchule,
    title = "Kooperation in der Schule",
    author = "Sabine {Schütt}",
    year = "2013",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-03626-8",
    url = "https://www.peterlang.com/document/1044494"
}