@book { WortemssenleiseZeichenbleiben,
    title = "«Worte müssen leise Zeichen bleiben»",
    author = "Eduard W. {Blättler}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Lausanne, Switzerland",
    url = "https://www.peterlang.com/document/1070903"
}