@book { DDRundCSSR19491989,
    title = "DDR und CS(S)R 1949-1989",
    author = "Milos {Rezník} and Katja {Rosenbaum}",
    year = "2021",
    publisher = "Meidenbauer",
    address = ", Germany",
    url = "https://www.peterlang.com/document/1109288"
}