@book { Russkoedeepriastie,
    title = "Russkoe deepričastie",
    author = "Sandra {Birzer}",
    year = "2010",
    publisher = "Biblion",
    address = ", Germany",
    doi = "10.3726/b13113",
    url = "https://www.peterlang.com/document/1056654"
}