D.B. Audretsch

Audretsch, D.B. and M.P. Feldman (2004). ‘Knowledge Spillovers and the Geography of Innovation’, in J.V. Henderson and J.-F. Thisse (eds), Handbook of Regional and Urban Economics 4. Cities and Geography. Amsterdam: Elsevier, 2713–2739.
Feldman, M.P. and D.B. Audretsch (1999). ‘Innovation in cities: Science-based diversity, specialization and localized competition’. European Economic Review 43.2: 209–229.
Audretsch, D.B. and M.P. Feldman (1996). ‘R&D Spillovers and the Geography of Innovation and Production’. The American Economic Review 86.3: 630–640.