9Dick,R. and Dicke,H. , 1979,Patterns of Trade in Knowledge,in International Economic Development and Resource Transfer, (Ed.) Aierser, H. , Tobingen.
10Hoekman,B. 1995,Tentative First Steps :An Assessment of the Uruguay Round Agreement on Services,in W. Martin and A. Winters (eds.)The Uruguay Round and the Developing Economies,Washington DC:World Bank.