@book { SportalsMassenphnomen,
    title = "Sport als Massenphänomen?",
    author = "Simone {Becker}",
    year = "2004",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832484378",
    url = "https://m.diplom.de/document/223624"
}