@book { Entspannung,
    title = "Entspannung",
    subtitle = "So genießen Sie jeden Tag",
    author = "Almut {Carlitscheck} and Sven-David {Müller}",
    year = "2010",
    publisher = "Schlütersche Verlagsgesellschaft mbH & Co. KG",
    address = ", Deutschland",
    url = "https://schluetersche.openpublishing.com/document/403704"
}