1. Adams JH (2012) Improving Nigerian border security: a comprehensive approach. Seminar paper, Joint Military Operations Department, US Naval War College, Newport, RI, 2 November.
2. Adepoju A, Boulton A (2007) Promoting integration through mobility: free movement and the ECOWAS protocol. Policy Development and Evaluation Service, Research paper no. 150. Geneva: United Nations High Commissioner for Refugees (UNHCR).