@book { HartmannsvonAueGregoriusundThomasMannsDerErwhlte,
    title = "Hartmanns von Aue Gregorius und Thomas Manns Der Erwählte",
    author = "Annette {Heilmann}",
    year = "2009",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783640247349",
    url = "https://www.hausarbeiten.de/document/120787"
}