@book { Imaginerlasocitfodale,
    title = "Imaginer la société féodale",
    subtitle = "Georges Dubys Bild des Mittelalters",
    author = "Steffen {Seischab}",
    year = "2005",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1099346"
}