@book { DasInternetunddasWorldWideWeb,
    title = "Das Internet und das World Wide Web",
    author = "Patrick {Hammer}",
    year = "2001",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783638101448",
    url = "https://www.hausarbeiten.de/document/193"
}