@book { PaarformelninmittelalterlichenStadtrechtstexten,
    title = "Paarformeln in mittelalterlichen Stadtrechtstexten",
    author = "Frauke {Thielert}",
    year = "2016",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-06162-8",
    url = "https://www.peterlang.com/document/1049953"
}