@book { Terrenanonamaresedcoelestia,
    title = "Terrena non amare sed coelestia",
    subtitle = "Theologie der Welt in Alkuins Commentaria super Ecclesiasten",
    author = "Michal {Kieling}",
    year = "2002",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1092179"
}