RT Article T1 Research summary: Lessons from a U.S. study revealing the critical role of 'gatekeepers' in public safety networks for countering violent extremism A1 Williams, Michael J. A2 Evans, William P. A2 Horgan, John 1974- LA English PB Curtin University YR 2015 UL https://krimdok.uni-tuebingen.de/Record/1912687240