@book { DerBegriffderEinbildungskraftbeiRudolfKassner,
    title = "Der Begriff der Einbildungskraft bei Rudolf Kassner",
    author = "Slawomir {Lesniak}",
    year = "1999",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1088930"
}