@book { DoRatingAnnouncementsconveynewInformation,
    title = "Do Rating Announcements convey new Information?",
    author = "Jan {Klobucnik}",
    year = "2010",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783836649285",
    url = "https://m.diplom.de/document/227891"
}