@book { FlugschriftenzumDreissigjhrigenKrieg,
    title = "Flugschriften zum Dreissigjährigen Krieg",
    author = "Maria {Pfeffer}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1081366"
}