@book { Tinnitus,
    title = "Tinnitus",
    subtitle = "Das Selbsthilfeprogramm bei quälenden Ohrgeräuschen. Weniger Leidensdruck - mehr Lebensfreude",
    author = "Dr. med. Marco {Weller}",
    year = "2022",
    publisher = "humboldt",
    address = "Hannover, Deutschland",
    url = "https://schluetersche.openpublishing.com/document/1273521"
}