@book { FundamentaloderTechnischeAnalyse,
    title = "Fundamental- oder Technische Analyse",
    author = "Clemens {Liepert}",
    year = "2011",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783842819603",
    url = "https://m.diplom.de/document/228582"
}