@book { HystoriavondemwirdigenrittersantWilhelm,
    title = "«Hystoria von dem wirdigen ritter sant Wilhelm»",
    author = "Holger {Deifuß}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1097364"
}