[4] Aghion, P. et al (2004) "Entry and productivity growth: evidence from microlevel panel data", Journal of the European Economic Association, april-mei 2(2-3), blz. 265-76.
[4] Aghion, P. et al (2004) “Entry and productivity growth: evidence from microlevel panel data”, Journal of the European Economic Association, April-Mai 2(2-3), S. 265-76.