4R.Dick & H.Dicke, Patterns of Trade in Knowledge [ M ]. In H. Gierseh ( ed. ) International Eoenornic I)evelopment and Resources Transfer, 1979, Tubingen: J.C.B. Mohr, p. 346.
5A.Sapir, Trade in Services: Policy Issues for the Eight- ies Coll-hla [J]. Journal of World Bank, 1982, (79).
6Hindley & Smith, Comparative Advantage and Trade in Services [J]. The World Economy, 1984, 7 (4): 369-389.
7B.Hoelman & G.Karsenty. Economic development and international transaction in services [J]. Development Policy Re- view, 1992, (10): 211-236.
8R.J.Langhammer. North- South trade in services: some empirical evidence [ M ]. Services in World Economic Growth, 1989:211 - 322.
9Deardoff, Comparative Advantage and Intemalional Trade and Investment in Services: Canada/Us Perspectives [M]. Toronto: onmr/o Econom/c oouncil, 1985: 39- 71.
10James R.Melvin. Trade In Produce Services: A Heckseher- Ohlin Approach [ J]. Journal of Politiead Economy, 1989, 97 (51).
