@book { LernendurchLehrenimGenerationendialog,
    title = "Lernen durch Lehren im Generationendialog",
    author = "Andreas {Deubel}",
    year = "2008",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783836620765",
    url = "https://m.diplom.de/document/226261"
}