7Cohen, R B. 1981.“The New International Division of Labor, Multinational Corporations and Urban Hierarehy”. In Urbanisation and Urban planning in Capitalist Soeiety, ed M dear and Seott, pp287-315,Methuen, London.
8Gillespie, A. E. and A. E. Green. 1987. “The changing geography of producer services employment in Britain”, Regional Studies 21: 397-411.
9Goe, W. R. 1991.“The Growth of Producer Services Industries: Sorting Through the Externalization Debate.” Growth and Change 22: 118-41.
8Donald R.Davis,David E Weinstein. A search for multiple equilibria in urban industrial structlure[J].Journal of Regional Science,2008,(01).
9Kate H Brown,Andrew L Jameton. Public Health Implications of Urban Agriculture[J].Journal of Public Health Policy,2000,(01):20-39.doi:10.2307/3343472.
10Michael E · Poter. Clusters and the New Economics of Competition[J].Harvard Business Review,1998.
