@book { ,
    title = "Многоязычие в Волго-Уральском регионе",
    author = "Monika {Wingender}",
    year = "2018",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b12361",
    url = "https://www.peterlang.com/document/1110525"
}