@book { Wegsperrenodereinschlieen,
    title = "Wegsperren oder einschließen?",
    author = "Edeltraud {Koller} and Ferdinand {Reisinger} and Michael {Rosenberger}",
    year = "2011",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-00435-9",
    url = "https://www.peterlang.com/document/1044504"
}