@book { GewaltanderBerufsschule,
    title = "Gewalt an der Berufsschule",
    author = "Sven {Kapelke, geb.Möllers}",
    year = "2008",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783836611602",
    url = "https://m.diplom.de/document/225699"
}