@book { MittelalterlicheErzhlungenundAnekdotenumRudolfvonHabsburg,
    title = "Mittelalterliche Erzählungen und Anekdoten um Rudolf von Habsburg",
    author = "Willi {Treichler}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Lausanne, Switzerland",
    url = "https://www.peterlang.com/document/1069278"
}