@book { CO2EmissionshandelChancenundRisikenfrdiedeutscheWirtschaft,
    title = "CO2-Emissionshandel - Chancen und Risiken für die deutsche Wirtschaft",
    author = "David {Klee}",
    year = "2010",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783836648530",
    url = "https://m.diplom.de/document/227860"
}