@book { FlotterDreier,
    title = "Flotter Dreier",
    subtitle = "ménage à trois",
    author = "Gina {di Lussuria}",
    year = "2019",
    publisher = "roter mund verlag",
    address = "Mannheim, Deutschland",
    url = "https://rotermundverlag.de/document/470766"
}