1. Anderson, R. L. (2013). The effect of urban fortification on public space (Doctoral Dissertation). Milwaukee: University of Wisconsin Milwaukee.
2. Atkins, P. J. (1993). How the West End was won: The struggle to remove street barriers in Victorian London. Journal of Historical Geography, 19(3), 265–277.
3. Banlaoi, R. C. (2007). Radical Muslim terrorism in the Philippines. In A. T. H. Tan (Ed.), A handbook of terrorism and insurgency in Southeast Asia (pp. 194–224). Cheltenham: Edward Elgar.
4. Banlaoi, R. C. (2009). Counter-terrorism in Southeast Asia: How effective are they?. Manila: Yuchengco Center.
5. Bannister, J., & Fyfe, N. (2001). Introduction: Fear and the city. Urban Studies, 38(5–6), 807–813.