@book { DasKonzilvonNica325undKonstantinderGroe,
    title = "Das Konzil von Nicäa (325) und Konstantin der Große",
    author = "Rolf {Bergmeier}",
    year = "2011",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783640889181",
    url = "https://www.hausarbeiten.de/document/170202"
}