@book { DasProblemderIdentittinGottfriedKellersProsawerk,
    title = "Das Problem der Identität in Gottfried Kellers Prosawerk",
    author = "Kristina {Russell-Sandberg}",
    year = "1981",
    publisher = "Peter Lang Verlag",
    address = "Lausanne, Switzerland",
    url = "https://www.peterlang.com/document/1071035"
}