@book { KletternimSchulsport,
    title = "Klettern im Schulsport",
    author = "Anja {Dinter}",
    year = "2007",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783638690232",
    url = "https://www.hausarbeiten.de/document/75133"
}