@book { ErlebnispdagogikinderStadt,
    title = "Erlebnispädagogik in der Stadt",
    author = "Alexander {Schwarz}",
    year = "2003",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832469528",
    url = "https://m.diplom.de/document/222285"
}