@book { Sprachentwicklungsstrungen,
    title = "Sprachentwicklungsstörungen",
    author = "Diane {Schmidt} and Heiko {Wulschner}",
    year = "2004",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783638250948",
    url = "https://www.hausarbeiten.de/document/21482"
}