@book { KriseundUntergangderRmischenRepublik,
    title = "Krise und Untergang der Römischen Republik",
    author = "Johannes {Mattes}",
    year = "2006",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783638507318",
    url = "https://www.hausarbeiten.de/document/55895"
}