@book { EtnosociolingvistikaPerestrojkivSSSR,
    title = "Etnosociolingvistika Perestrojki v SSSR",
    author = "Aleksandr D. {Duličenko}",
    year = "1999",
    publisher = "Biblion",
    address = ", Germany",
    doi = "10.3726/b12615",
    url = "https://www.peterlang.com/document/1067056"
}