@book { NeizvestnyjpoetPDButurlinanaliztvorestva,
    title = "Neizvestnyj poet P. D. Buturlin - analiz tvorčestva",
    author = "Olga {Schmidt}",
    year = "1971",
    publisher = "Biblion",
    address = ", Germany",
    doi = "10.3726/b12188",
    url = "https://www.peterlang.com/document/1066728"
}