@book { DierussischeDiasporainEuropaim20Jahrhundert,
    title = "Die russische Diaspora in Europa im 20. Jahrhundert",
    author = "Adelbert {Davids} and Fedor B. {Poljakov}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1104835"
}