@book { AktivlebentrotzRheuma,
    title = "Aktiv leben - trotz Rheuma",
    author = "Iris {Ottinger} and Dr. med. Monika {Ronneberger} and Dr. med. Florian {Schuch}",
    year = "2015",
    publisher = "humboldt",
    address = "Hannover, Deutschland",
    url = "https://schluetersche.openpublishing.com/document/403968"
}