4Antonelli, C. 1998. Localised technological change, new information technology and the knowledge-based economy: the European evidence, Journal of Evolutionary Economics, vol. 8:177 - 198.
5Den Hertog and Bilderbeek, R. 1998. Innovation in and through knowledge intensive business services in the Netherlands,TNO - report STB/90/03, TNO/STB 1997.
6Evangelista, R. 2000. Sectoral patterns of technological change in services, Economics of Innovation and New Technology,vol. 9:183-221.
7Horst Raft and Marc vonder Ruhr, 2001. Foreign direct investment in producer services: theory and empirical evidence, CESifo working paper No. 598.
8Levine, R. 1997. Financeial development and economic growth: views and agenda, Journal of Economic Literature, vol. 25:688-725.
9Markusen, J.R. 1989. Trade in producer services and other specialized intermediate inputs, American Economic Review79:85-95.
10Martin Andersson, 2004. Co - location of manufacturing&producer services: a simulations equation approach, http://www.iufra.kth.se/cesis/research/workpap.htm.
