@book { AnalysedesWertpapierhandelsimInternet,
    title = "Analyse des Wertpapierhandels im Internet",
    author = "Markus {Wallner}",
    year = "2000",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832429034",
    url = "https://m.diplom.de/document/218629"
}