@book { IntegrationsproblemevonRusslanddeutschen,
    title = "Integrationsprobleme von Russlanddeutschen",
    author = "Irina {Liebenstein}",
    year = "2009",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    url = "https://m.diplom.de/document/227214"
}