@book { DiekatalanischeSpracheimMittelalter,
    title = "Die katalanische Sprache im Mittelalter",
    author = "Veronika {Neumann}",
    year = "2002",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783638114998",
    url = "https://www.hausarbeiten.de/document/2466"
}