@book { DieGrundschulenvonmorgenWasderJenaPlanbringenknnte,
    title = "Die Grundschulen von morgen: Was der Jena-Plan bringen könnte",
    author = "Birgit {Koperski}",
    year = "2013",
    publisher = "BACHELOR + MASTER PUBLISHING",
    address = "Hamburg, Deutschland",
    url = "https://m.bachelor-master-publishing.de/document/296568"
}