@book { WirklichkeitinderDichtungRilkes,
    title = "Wirklichkeit in der Dichtung Rilkes",
    author = "Renate {Breuninger}",
    year = "1991",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1079375"
}