1. Ahmad, Y., El Seraph, S., Lutz, E., 1989. Environmental accounting for sustainable development. UNEP World Bank Symposium, World Bank Technical Paper No. 189. World Bank, Washington, DC.
2. Black, W., Munn, D., Black, R., Xie, B., 1995. Modal Choices: An Approach to Comparing the Costs of Transportation Alternatives. Transportation Research Center, Indiana University, Bloomington, IN.
3. Spillovers and the location effects of public infrastructure;Boarnet;Journal of Regional Science,1998
4. Boarnet, M.G., Haughwout, A.F., 2000. Do highways matter? Evidence and policy implications of highways’ influence on metropolitan development. Discussion Paper. Brookings Institution, Washington, DC.
5. Handbook of Logistics and Supply Chain Management, vol. 2. Transport Services,2001