@book { DerGeschwisterinzestimGregoriusvonHartmannvonAue,
    title = "Der Geschwisterinzest im Gregorius von Hartmann von Aue",
    author = "Morgana {Perkow}",
    year = "2007",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783638830140",
    url = "https://www.hausarbeiten.de/document/78397"
}