1. Freighter cost comparisons;Aircraft Economics;Aircraft Economics,1999
2. Ahuja, V. and Filmer, D., 1995. “Educational Attainment in Developing Countries; New Estimates and projections Disaggregated by Gender,” World Bank Policy Research Working Paper 1489.
3. “A strange new climate”;Badger;International Freight Weekly, February,2012
4. Climate change policy, market structure and carbon leakage;Babiker;Journal of International Economics,2005
5. “On the conservation of distance in international trade”;Berthelon;Journal of International Economics,2008