@book { DieFreundschaftzwischenGoetheundSchiller,
    title = "Die Freundschaft zwischen Goethe und Schiller",
    author = "Elke {Schacht}",
    year = "2011",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783640855902",
    url = "https://www.hausarbeiten.de/document/168524"
}