@book { DieAbstractaumundrazumbeiBelinskij,
    title = "Die Abstracta um und razum bei Belinskij",
    author = "Rolf {Lettmann}",
    year = "1971",
    publisher = "Biblion",
    address = ", Germany",
    doi = "10.3726/b12183",
    url = "https://www.peterlang.com/document/1066723"
}