1. Acs, Z. J. and Audretsch, D. B. (1987) ?Innovation, Market Structure and Firm Size?,Review of Economics and Statistics,69, 567?575.
2. Acs, Z. J. and Audretsch, D. B. (1988) ?Innovation in Large and Small Firms: An Empirical Analysis?,American Economic Review,78, 678?690.
3. Acs, Z. J. and Audretsch, D. B. (1990)Innovation and Small Firms, Cambridge, MA, MIT Press.
4. Audretsch, D. B. (1995)Innovation and Industry Evolution, Cambridge MA, MIT Press.
5. Baldwin, W. L. and Scott, J. T. (1987)Market Structure and Technological Change. London and New York, Harwood Academic Publishers.