@book { DeregulierungderStrommrkte,
    title = "Deregulierung der Strommärkte",
    author = "Marcus {Wiemann}",
    year = "1998",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832407230",
    url = "https://m.diplom.de/document/216242"
}