@book { Begegnungen,
    title = "Begegnungen",
    subtitle = "Was uns in ihnen berührt und bewegt",
    author = "Marie-Louise {Käsermann}",
    year = "2010",
    publisher = "Peter Lang Verlag",
    address = "Lausanne, Switzerland",
    url = "https://www.peterlang.com/document/1106335"
}