@book { DieStecknadelimHeuhaufen,
    title = "Die Stecknadel im Heuhaufen",
    author = "Christoph {Rösener}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1100038"
}