@book { RusslanddeutscheundihrGlcksempfinden,
    title = "Russlanddeutsche und ihr Glücksempfinden ",
    author = "Christiane {Matthes}",
    year = "2008",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783638061667",
    url = "https://www.hausarbeiten.de/document/92457"
}