@book { HartmannvonAuesIwein,
    title = "Hartmann von Aues Iwein",
    author = "Petra {Richter}",
    year = "2010",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783640677719",
    url = "https://www.hausarbeiten.de/document/155324"
}