@book { KaiserinElisabethDenkmlerinWien,
    title = "Kaiserin Elisabeth-Denkmäler in Wien",
    author = "Günther {Berger}",
    year = "2003",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1094992"
}