@book { GrenzenderDeckungsbeitragsrechnungalsMarketingInformationsinstrument,
    title = "Grenzen der Deckungsbeitragsrechnung als Marketing-Informationsinstrument",
    author = "Frank {Schmitt-Schreiner}",
    year = "2001",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832434236",
    url = "https://m.diplom.de/document/219092"
}