@book { ffnungen,
    title = "Öffnungen",
    subtitle = "Tagungsband des 23. Polyaisthesis-Symposions auf Schloss Drosendorf",
    author = "Michaela {Schwarzbauer}",
    year = "2006",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1100838"
}