@book { IngeborgBachmann,
    title = "Ingeborg Bachmann",
    subtitle = "Die neue Sprache",
    author = "Manfred {Jurgensen}",
    year = "1981",
    publisher = "Peter Lang Verlag",
    address = "Lausanne, Switzerland",
    url = "https://www.peterlang.com/document/1071018"
}