@book { EPortfolioBlogCoWeb20TechnologieninderGrundschule,
    title = "E-Portfolio, Blog & Co. Web 2.0 Technologien in der Grundschule",
    author = "Tamara {Rachbauer}",
    year = "2012",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    url = "https://m.diplom.de/document/229317"
}