@book { AggressivesVerhaltenundDelinquenz,
    title = "Aggressives Verhalten und Delinquenz",
    author = "Katharina {Niehoff} and Constanze {Kleinert}",
    year = "2003",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783638220385",
    url = "https://www.hausarbeiten.de/document/17463"
}