1J.W.Hmxington.Empirical Research on Producer Service Growth and Regional Development: International Comparisons [J].Protirssional Geographer, 1995, ( 1 ).
2W.B Beyers.Produces services[J].Progress in Human Geography , 1993(2).
3W.R Goe.Producer services,Trade and the Social Division of Labor[J].Regional Studies, 1990, (d).
4S.Illeris.Produeer Services:The Key Sector for Future Economic Development[J].Entrepreneurship and Regional Developmem, 1989, ( 1 ).