@book { TeleteachingimInternetAngebotundTechnologieberblick,
    title = "Teleteaching im Internet-Angebot und Technologieüberblick",
    author = "Rainer {Mohr}",
    year = "2000",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832420581",
    url = "https://m.diplom.de/document/217851"
}