@book { RussianChallenges,
    title = "Russian Challenges",
    author = "Galina {Michaleva} and Andrey {Ryabov}",
    year = "2011",
    publisher = "Peter Lang Verlag",
    address = "Lausanne, Switzerland",
    doi = "10.3726/978-3-0351-0190-4",
    url = "https://www.peterlang.com/document/1052261"
}