@book { AerobictrendsimSchulsport,
    title = "Aerobictrends im Schulsport",
    author = "Katharina {Kittel}",
    year = "2004",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832477394",
    url = "https://m.diplom.de/document/222980"
}