@book { NonnasrauhaarigeRomantiker,
    title = "Nonnas rauhaarige Romantiker",
    author = "Luzi {van Gisteren}",
    year = "2022",
    publisher = "via tolino media",
    address = "München, Deutschland",
    url = "https://tolino.openpublishing.com/document/1177212"
}