1. Acs, Z.J., Audretsch, D.B., 1990. Innovation and Small Firms. MIT Press, Cambridge, MA.
2. Ahuja, G., Lampert, C.M., 2000. Entrepreneurship in the large corporation: a longitudinal study of how established firms create breakthrough inventions. Working Paper.
3. Collective invention;Allen;Journal of Economic Behavior & Organization,1983
4. Capital markets and corporate structure: the equity carve-outs of Thermo Electron;Allen;Journal of Financial Economics,1998
5. The exploration of technological diversity and the geographic localization of innovation;Almeida;Small Business Economics,1997