Andrew Silke; Anastasia Filippidou (June 2020). "What drives terrorist innovation? Lessons from Black September and Munich 1972". Security Journal. 33 (2): 210–227. doi:10.1057/s41284-019-00181-x. hdl:1826/14221. S2CID256516270.
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Andrew Silke; Anastasia Filippidou (June 2020). "What drives terrorist innovation? Lessons from Black September and Munich 1972". Security Journal. 33 (2): 210–227. doi:10.1057/s41284-019-00181-x. hdl:1826/14221. S2CID256516270.
Andrew Silke; Anastasia Filippidou (June 2020). "What drives terrorist innovation? Lessons from Black September and Munich 1972". Security Journal. 33 (2): 210–227. doi:10.1057/s41284-019-00181-x. hdl:1826/14221. S2CID256516270.