1. The road freight industry in Nigeria: new challenges in an era of structural adjustment;Alokan;Transport Reviews,1995
2. Aschauer, D.A., 1990. Why is infrastructure important?, Conference Proceedings, Conference series no. 34, Federal Reserve Bank of Boston.
3. China's new regional trade agreements;Antkiewicz;World Economy,2005
4. Australian Bureau of Statistics, 2006. Australian National Accounts: National Income, Expenditure and Product, Canberra.
5. Australian Department of Foreign Affairs and Trade, 2005. Australia-China Free Trade Agreement Joint Feasibility Study, Canberra.