1. Azam, J.-P. (1990) ‘Informal Integration through Parallel Markets for Goods and Foreign Exchange’, in World Bank, The Long-Term Perspective Study of Sub Saharan Africa, vol. 4: Proceedings of a Workshop on Regional Integration and Cooperation pp. 48–51 (Washington, DC: World Bank).
2. Azam, J.-P. (1991a) ‘Cross-Border Trade between Niger and Nigeria, 1980–1987: The Parallel Market for the Naira’, in M. Roemer and C. Jones (eds), Markets in Developing countries. Parallel, Fragmented, and Black pp. 47–61 (San Francisco: ICS).
3. Azam, J.-P. (1991b) ‘Niger and the Naira: Some Monetary Consequences of Cross-Border Trade with Nigeria’, in A. Chhibber and S. Fischer (eds), Economic Reform in Sub Saharan Africa, pp. 66–75 ( Washington, DC: World Bank ).
4. Azam, J.-P. and T. Besley (1989a) ‘General Equilibrium with Parallel Markets for Goods and Foreign Exchange: Theory and Application to Ghana’, World Development, 17: 1921–30.
5. Azam, J.-P. and T. Besley (1989b) ‘The Case of Ghana’, in J.-P. Azam, T. Besley, L. Maton, D. Bevan, P. Collier and P. Horsnell, The Supply of Manufactured Goods and Agricultural Development, Development Centre Studies ( Paris: OECD).