@book { FotografierenArchivierenPrsentieren,
    title = "Fotografieren. Archivieren. Präsentieren.",
    author = "Konstanze {Werner} and Horst {Werner}",
    year = "2012",
    publisher = "humboldt",
    address = "Hannover, Deutschland",
    url = "https://schluetersche.openpublishing.com/document/403215"
}