@book { RichardWagnersParsifaleineAnalyse,
    title = "Richard Wagners Parsifal - eine Analyse",
    author = "Saskia {Guckenburg}",
    year = "2012",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783656167600",
    url = "https://m.hausarbeiten.de/document/191989"
}