@book { FranzUnglerOrganismusundSelbstbewutsein,
    title = "Franz Ungler: Organismus und Selbstbewußtsein",
    author = "Michael {Wladika} and Michael {Höfler}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1100928"
}