@book { EinsamkeitIdyllundUtopie,
    title = "Einsamkeit, Idyll und Utopie",
    subtitle = "Studien zum Problem von Einsamkeit und Bindung in Gottfried Kellers Romanen und Novellen",
    author = "Hanspeter {Gsell}",
    year = "1977",
    publisher = "Peter Lang Verlag",
    address = "Lausanne, Switzerland",
    url = "https://www.peterlang.com/document/1069996"
}