1. J. Kleinen and M. Osseweijer, “Southeast Asia,” in Pirates, ports, and coasts in Asia : historical and contemporary perspectives, Institute of Southeast Asian Studies, 2010, pp. 131–299.
2. R. R. Singh, “Terrorism: Malaysia Cooperation with Asean Post 9/11,” M.S. Thesis, Universiti Malaysia Sarawak, 2014.
3. Effect of esszone establishment on maritime security and economic activity: A case study of Tawau District
4. Sumisha Naidu, “Lying in wait: Behind Malaysia’s influx of foreign terrorists - CNA,” in CNA, 2017, pp. 17–23.
5. Michael Hart, “Eastern Sabah: Malaysia’s Frontline Against Militancy I The Diplomat,” in The Diplomat, 2018, pp. 21–25.