@book { DasmittellateinischeEpyllion,
    title = "Das mittellateinische Epyllion",
    subtitle = "Studien zur Kleinform der epischen Dichtung im Mittelalter",
    author = "Patryk Michał {Ryczkowski}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Lausanne, Switzerland",
    doi = "10.3726/b18896",
    url = "https://www.peterlang.com/document/1160003"
}