RT Article T1 Kill one or kill them all?: differences between single and multiple victim school attacks JF European journal of criminology VO 12 IS 3 SP 277 OP 299 A1 Bondü, Rebecca A2 Scheithauer, Herbert 1970- LA English YR 2015 UL https://krimdok.uni-tuebingen.de/Record/1630291226 K1 Leaking K1 Risk factor K1 School attacks K1 Victim K1 Warning sign