@online{ timsrc, author = "Wulf, Rüdiger", title = "Kriminalprävention: "School shootings" und (Hoch)Schulsicherheit", publisher = "Universität Tübingen", year = "2011", month = "Jun", day = "30", url = "https://timms.uni-tuebingen.de:443/tp/UT_20110630_001_rvkrimi_0001", urldate = "2024-12-22" }