@book { ContententwicklungimeLearning,
    title = "Contententwicklung im e-Learning",
    author = "Tobias {Ott}",
    year = "2004",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832483623",
    url = "https://m.diplom.de/document/223554"
}