@online{ timsrc, author = "Gugel, Günther", title = "Kriminalprävention: (Gewalt)Prävention in der Schule", publisher = "Universität Tübingen", year = "2011", month = "May", day = "05", url = "https://timms.uni-tuebingen.de:443/tp/UT_20110505_001_rvkrimi_0001", urldate = "2024-12-22" }