@book { SportvereineimTourismus,
    title = "Sportvereine im Tourismus",
    author = "Alberto {Lopez Pastorini}",
    year = "2005",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832486105",
    url = "https://m.diplom.de/document/223804"
}