@book { PolitischeHftlingeinderDDR,
    title = "Politische Häftlinge in der DDR",
    author = "Lana {Körner}",
    year = "2015",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    url = "https://www.hausarbeiten.de/document/293829"
}