4Aaditya Mattoo, Robert M. Stern, Gianni Zanini, A Handbook of International Trade in Services. Oxford University Press,2009,pp. 2 10.
5Bin Xu, Measuring China's Export Sophistication. CEIBS Working Paper,2007, pp. 1-31.
6Bosworth, B. P. and Triplett, J. E, Productivity Measurement Issues in Services Industries: Baumol's Disease Has Been Cured. Brookings: The Brookings Institution, 2003,pp. 53-69.
7Bhagwati,J. N. ,Why Are Services Cheaper in the Pool Countries? Economic Journal, Vol. 94,1984 ,pp. 279-286.
8Deardorff, A. V. , International Provision of Trade Services, Trade, and Fragmentation. WTO Working Paper, 2000.
9Guerrieri, Paolo. Meliciani, Valentina, Technology and international competitiveness.- The interdependence between manufacturing and producer services. Structural change and economic dynamics, Vol. 4, 2005, pp. 489-502.
10Hausmann, R, J. Hwang and D. Rodrik, What you export matters. Journal of Economic Grovth, Vol. 12, 2007, pp. 1-25.