@book { DerTerminderdoppeltenSonnenfinsternis,
    title = "Der Termin der doppelten Sonnenfinsternis",
    author = "Topaz {Hauyn}",
    year = "2023",
    publisher = "via tolino media",
    address = "München, Deutschland",
    url = "https://tolino.openpublishing.com/document/1339667"
}