@book { DasWesenderTrume,
    title = "Das Wesen der Träume",
    subtitle = "The Nature of Dreams",
    author = "Erich {Fromm} and Rainer {Funk}",
    year = "2016",
    publisher = "Edition Erich Fromm",
    address = "München, Deutschland",
    url = "https://books.openpublishing.com/document/313979"
}