@book { Wechseljahre,
    title = "Wechseljahre",
    subtitle = "Positiv und entspannt in eine neue Lebensphase",
    author = "Gisa {Bührer-Lucke}",
    year = "2010",
    publisher = "humboldt",
    address = "Hannover, Deutschland",
    url = "https://schluetersche.openpublishing.com/document/403443"
}