@book { DeutscheLiteraturgeschichte,
    title = "Deutsche Literaturgeschichte",
    author = "Georg {Hager}",
    year = "2003",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783640058419",
    url = "https://www.hausarbeiten.de/document/107586"
}