@book { DieDeutscheVolksgruppeinJugoslawien19181941,
    title = "Die Deutsche Volksgruppe in Jugoslawien 1918-1941",
    author = "Johann {Böhm}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1107330"
}