@book { WashattenwirbeimVgelnSpa,
    title = "Was hatten wir beim Vögeln Spaß",
    author = "Rico {Herz}",
    year = "2026",
    publisher = "roter mund verlag",
    address = "Mannheim, Deutschland",
    url = "https://rotermundverlag.de/document/1687225"
}