@book { DasNachbarsprachenmodellinderPraxis,
    title = "Das Nachbarsprachenmodell in der Praxis",
    author = "Justyna {Wieczorek-Hecker}",
    year = "2006",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    url = "https://m.diplom.de/document/224764"
}