@book { StudienzumRealismusISTurgenevs,
    title = "Studien zum Realismus I. S. Turgenevs",
    author = "Paul {Hacker}",
    year = "1988",
    publisher = "Biblion",
    address = ", Germany",
    doi = "10.3726/b12987",
    url = "https://www.peterlang.com/document/1067331"
}