1. Acs Z., Arenius P., Hay M., Minitti M. Global Entrepreneurship Monitor: 2004 executive report. Babson College and London, London Business School: Babson Park MA, 2004
2. Acs, Z. J., Audretsch, D., Braunerhjelm, P. & Carlsson, B. (2005.). The knowledge spillover theory of entrepreneurship. Discussion papers on entrepreneurship, growth and public policy, group entrepreneurship, growth and public policy. Jena Germany: Max Planck Institute of Economics.
3. Arundel A., Hollanders H. Policy, indicators and targets: Measuring the impacts of innovation policies, European trend chart on innovation, Enterprises Directorate-General. European Commission: Brussels, 2005
4. Audretsch D. B. Innovation and Industry Evolution. Boston, MIT Press: Cambridge, 1995
5. Sustaining Innovation and Growth: Public Policy Support for Entrepreneurship