@book { EinMauerfallZweiPerspektiven,
    title = "Ein Mauerfall. Zwei Perspektiven",
    author = "Susann {Hochmuth}",
    year = "2014",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    url = "https://www.hausarbeiten.de/document/278256"
}