@book { Schulentwicklung,
    title = "Schulentwicklung",
    author = "Silke {Fischer}",
    year = "2016",
    publisher = "Peter Lang Verlag",
    address = "Lausanne, Switzerland",
    doi = "10.3726/b10774",
    url = "https://www.peterlang.com/document/1067728"
}