@book { KopfschmerzenundMigrneerfolgreichbehandeln,
    title = "Kopfschmerzen und Migräne erfolgreich behandeln",
    author = "Dr. med. Anette {Delbrück}",
    year = "2010",
    publisher = "humboldt",
    address = "Hannover, Deutschland",
    url = "https://schluetersche.openpublishing.com/document/403373"
}