1. Aldrich, H.E., J. Cater, T. Jones, D. McEvoy and P.Velleman, 1985, ?Ethnic Residential Concentration and the Protected Market Hypothesis?, Social Forces 63, 996?1009.
2. Bergman, E., E. Feser and S. Sweeny, 1996, ?Targeting North Carolina Manufacturing: Understanding the State?s Economy Through Industrial Cluster Analysis.? Institute fore Economic Development. University of North Carolina at Chapel Hill.
3. Birch, D.L., 1981, ?Who Creates Jobs??, The Public Interest 65, 3?14.
4. Birch, D.L., 1983, Share of Jobs vs. Share of Job Creation: A Flow Analysis. Cambridge, MA.
5. Birley, S., 1984, Finding the New Firm. Academy of Management Proceedings, 44th Annual Meetings, pp. 64?68.