@book { Der1PeloponnesischeKrieg,
    title = "Der 1. Peloponnesische Krieg ",
    author = "Inka {Hemmerich}",
    year = "2011",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783640926206",
    url = "https://www.hausarbeiten.de/document/172649"
}