@book { ValverdesWegzumSchatzderInka,
    title = "Valverdes Weg zum Schatz der Inka",
    author = "Emma {Varell}",
    year = "2023",
    publisher = "via tolino media",
    address = "München, Deutschland",
    url = "https://tolino.openpublishing.com/document/1353491"
}