@book { DerGruppenbezugjugendlicherDelinquenz,
    title = "Der Gruppenbezug jugendlicher Delinquenz",
    author = "Julia {Lehmann-Björnekärr}",
    year = "2014",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-04363-1",
    url = "https://www.peterlang.com/document/1048532"
}