@book { DieZukunftderglobalenEnergieversorgung,
    title = "Die Zukunft der globalen Energieversorgung",
    author = "Jens {Bahnsen}",
    year = "2008",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783836620468",
    url = "https://m.diplom.de/document/226235"
}