@book { DieLebensquelle,
    title = "Die Lebensquelle",
    subtitle = "Lebensphilosophie und persönlicher Mythos im Spätwerk Robert Walsers",
    author = "Martin {Suter}",
    year = "1984",
    publisher = "Peter Lang Verlag",
    address = "Lausanne, Switzerland",
    url = "https://www.peterlang.com/document/1070756"
}