@book { SchwabstedtunddieBischfevonSchleswig12681705,
    title = "Schwabstedt und die Bischöfe von Schleswig (1268-1705)",
    author = "Oliver {Auge} and Stefan {Magnussen}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b17513",
    url = "https://www.peterlang.com/document/1111689"
}