@book { RechtsbegriffeimMittelalter,
    title = "Rechtsbegriffe im Mittelalter",
    author = "Albrecht {Cordes} and Bernd {Kannowski}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1095022"
}