@book { TheorieundEmpirievonSpekulationsblasen,
    title = "Theorie und Empirie von Spekulationsblasen",
    author = "Sebastian {Klimonczyk}",
    year = "2015",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    url = "https://m.diplom.de/document/311580"
}