@book { MultimedialeBildungstechnologienI,
    title = "Multimediale Bildungstechnologien I",
    subtitle = "Anwendungen und Implementation",
    author = "Christoph {Lattemann} and Thomas {Köhler}",
    year = "2005",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1099780"
}