@book { StrategischeOnlineplanung,
    title = "Strategische Onlineplanung",
    subtitle = "Ein Vorgehensmodell zur Realiserung von Electronic Commerce",
    author = "Nils {Müller}",
    year = "2000",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832423025",
    url = "https://m.diplom.de/document/218118"
}