@book { DasUngarnbildinderdeutschsprachigenHistoriographiedesMittelalters,
    title = "Das Ungarnbild in der deutschsprachigen Historiographie des Mittelalters",
    author = "Tünde {Radek}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1104865"
}