1. Acs, Zoltan J. and David B. Audretsch, 1987, ?Innovation, Market Structure and Firm Size?,Review of Economics and Statistics 69(4), 567?575.
2. Acs, Z. J. and David B. Audretsch, 1988, ?Innovation in Large and Small Firms: An Empirical Analysis?,American Economic Review 78(4), 678?690.
3. Acs, Zoltan, David B. Audretsch, and Maryann P. Feldman, 1992, ?Real Effects of Academic Research?,American Economic Review 82, 363?367.
4. Acs, Zoltan, David B. Audretsch, and Maryann P. Feldman, 1993, ?R&D Spillovers and Recipient Firms Size?,Review of Economic and Statistics 75(4).
5. Begg, I. G. and G. C. Cameron, 1988, ?High Technology Location and the Urban Areas of Great Britain?,Urban Studies 25, 361?379.