@book { GriechischerStadtstaatundhegemonialeMonarchie,
    title = "Griechischer Stadtstaat und hegemoniale Monarchie",
    author = "Stavros {Giannopoulos}",
    year = "2011",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1136140"
}