@book { MethodiosundKyrillosinihrereuropischenDimension,
    title = "Methodios und Kyrillos in ihrer europäischen Dimension",
    author = "Evangelos {Konstantinou}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1099344"
}