@book { textern,
    title = "textern",
    author = "Phöbe A. {Häcker} and Thorsten {Mundi} and Brigitte {Rath} and Markus {Wiefarn}",
    year = "2021",
    publisher = "Meidenbauer",
    address = ", Germany",
    url = "https://www.peterlang.com/document/1105763"
}