1Edward L. Glaeser, David Laibson & Bruce Saeerdote. The economic approach to social capital. Cambridge, MA. : National Bureau of Economic Research, Working Paper, June, 2000.
2James D. Coleman: Foundation of Social Capital, Cambridge: Harvard University Press, 1990.
3Robert J. Putnam: Bowling alone, the Collapse and Revival of American Community. New York, Simon and Schuster, 2000.
