1. Dutton, Y. (2013). Gunslingers on the high seas: a call for regulation. Duke Journal of Comparative & International Law, 24(1), 107–160.
2. Roundtable of International Shipping Associations (2011). Letter for Secretary-General Ban Ki-Moon. Available at: https://www.bimco.org/~/media/About/Press/2011/Letter_to_Ban_Ki-Moon_-_Piracy.ashx . Accessed 28 Nov 2014.
3. Cullen, P. (2012). Surveying the market in maritime private security services. In C. Berube & P. Cullen (Eds.), Maritime private security. Market responses to piracy, terrorism, and waterborne security risks in the twenty-first century (pp. 25–37). London: Routledge.
4. Agnew, A. (1994). The territorial trap: the geographical assumptions of international relations theory. Review of International Political Economy, 1(1), 53–80.
5. Leander, A. (2010). Practices (Re)producing orders: understanding the role of business in global security governance. In M. Ougaard (Ed.), Business and global governance (pp. 57–78). Abingdon: Routledge.