2. Sami Zeidan, Desperately Seeking Definition: The International Community's Quest for Identifying the Specter of Terrorism, 36 Cornell International Law Journal (2004) pp. 491-492 - via www.wikipedia.org
3. http://www.terrorism-research.com/ via Rommel C. Banlaoi, Counter- Terrorism Measures in Southeast Asia: How Effective Are They? (Manila: Yuchengco Center, 2009)