@book { DenHimmelffnen,
    title = "Den Himmel öffnen …",
    author = "Therese {Bruggisser-Lanker}",
    year = "2014",
    publisher = "Peter Lang Verlag",
    address = "Lausanne, Switzerland",
    doi = "10.3726/978-3-0351-0679-4",
    url = "https://www.peterlang.com/document/1052904"
}