@book { WebContentManagementSysteme,
    title = "Web Content Management Systeme",
    author = "Oliver C. {Lange}",
    year = "2002",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832448783",
    url = "https://m.diplom.de/document/220447"
}