@book { VermitteltesMittelalter,
    title = "Vermitteltes Mittelalter?",
    author = "Iris {Mende}",
    year = "2013",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-03358-8",
    url = "https://www.peterlang.com/document/1046073"
}