@book { ZuHorstFuhrmannEinladunginsMittelalter,
    title = "Zu Horst Fuhrmann Einladung ins Mittelalter",
    author = "Kristina {Scherer}",
    year = "2008",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783640158928",
    url = "https://www.hausarbeiten.de/document/114790"
}