1. Arrighetti A, Lasagni A, Seravalli G (2001) Capitale Sociale, Associazionismo Economico e Istituzioni: Indicatori Statistici di Sintesi, Working Papers n. 4, Dipartimento di Economia, Università di Parma
2. Bagnasco A (2002) Il Capitale Sociale nel Capitalismo che Cambia. Stato e Mercato 65(2):271–303
3. Becattini G (1990) The Marshallian industrial district as a socio-economic notion. In: Pyke F, Becattini G, Sengenberger W (eds) Industrial districts and inter-firm cooperation in Italy. ILO, Geneva
4. Bowles S, Gintis H (2000) Optimal parochialism: the dynamics of trust and exclusion in networks. Department of Economics, University of Massachusetts, mimeo, February 2000
5. Camagni R (1991) Technological change, uncertainty and innovation networks: towards a dynamic theory of economic space. In: Camagni R (ed) Innovation networks: spatial perspectives. Belhaven-Pinter, London, pp 121–144