RT Article T1 The critical role of friends in networks for countering violent extremism: Toward a theory of vicarious help-seeking JF Behavioral sciences of terrorism & political aggression VO 8 IS 1 SP 45 OP 65 A1 Williams, Michael J. A2 Evans, William P. A2 Horgan, John 1974- LA English YR 2016 UL https://krimdok.uni-tuebingen.de/Record/1912503034 DO 10.1080/19434472.2015.1101147