@book { OrsolinaDaseisigeSanatoriumindenBergen,
    title = "Orsolina – Das eisige Sanatorium in den Bergen",
    author = "Meinhard-Wilhelm {Schulz}",
    year = "2023",
    publisher = "Bärenklau Exklusiv",
    address = ", Deutschland",
    url = "https://tolino.openpublishing.com/document/1373618"
}