@book { DasPferddieBrckezurAuenwelt,
    title = "Das Pferd - die Brücke zur Außenwelt",
    author = "Natascha {Vonderstraß}",
    year = "2002",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832457044",
    url = "https://m.diplom.de/document/221176"
}