@book { AnHermannHesse,
    title = "An Hermann Hesse",
    subtitle = "Der Leser als Produzent",
    author = "Gabriele {Lück}",
    year = "2009",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1106696"
}