@book { SelbstoderNaturSchellingsAnfanginRuland,
    title = "Selbst oder Natur. Schellings Anfang in Rußland",
    author = "Sigrun {Biefeldt}",
    year = "2008",
    publisher = "Biblion",
    address = ", Germany",
    doi = "10.3726/b12026",
    url = "https://www.peterlang.com/document/1056347"
}